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# Models overview¶
¶
Claude is a family of state-of-the-art large language models developed by Anthropic. This guide introduces the available models and compares their performance.¶
¶
---¶
¶
## Choosing a model¶
¶
If you're unsure which model to use, consider starting with **Claude Opus 4.8** for the most complex tasks. It is Anthropic's most capable Opus-tier model for complex reasoning, long-horizoncomplex agentic coding, and high-autonomyenterprise work. For workloads that need the highest available capability, usee [Claude Fable 5](#claude-fable-5-and-claude-mythos-5).¶
¶
All current Claude models support text and image input, text output, multilingual capabilities, and vision. Models are available through the Claude API, [Claude Platform on AWS](/docs/en/build-with-claude/claude-platform-on-aws), [Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock), [Google Cloud](/docs/en/build-with-claude/claude-on-vertex-ai), and [Microsoft Foundry](/docs/en/build-with-claude/claude-in-microsoft-foundry).¶
¶
Once you've picked a model, [learn how to make your first API call](/docs/en/get-started).¶
¶
### Claude Fable 5 and Claude Mythos 5¶
¶
Claude Fable 5 (`claude-fable-5`) is Anthropic's most capable widely released model. Claude Mythos 5 (`claude-mythos-5`) joins the invitation-only Claude Mythos Preview (`claude-mythos-preview`) within [Project Glasswing](https://anthropic.com/glasswing). See [Introducing Claude Fable 5 and Claude Mythos 5](/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5) for launch details and API changes.¶
¶
| Feature | Claude Fable 5 | Claude Mythos 5 |¶
| --------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |¶
| **Description** | Anthropic's most capable widely released model, for the most demanding reasoning and long-horizon agentic work | Available through Project Glasswing. Successor to Claude Mythos Preview. |¶
| **Claude API ID** | `claude-fable-5` | `claude-mythos-5` |¶
| **AWS Bedrock ID** | anthropic.claude-fable-5 | Limited availability |¶
| **Google Cloud ID** | claude-fable-5 | Limited availability |¶
| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | No |¶
| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes (always on) | Yes (always on) |¶
| **Context window** | <Tooltip tooltipContent="Claude Fable 5 and Claude Mythos 5 use the tokenizer introduced with Claude Opus 4.7. Compared to models before Claude Opus 4.7, the same text produces roughly 30% more tokens.">1M tokens</Tooltip> | <Tooltip tooltipContent="Claude Fable 5 and Claude Mythos 5 use the tokenizer introduced with Claude Opus 4.7. Compared to models before Claude Opus 4.7, the same text produces roughly 30% more tokens.">1M tokens</Tooltip> |¶
| **Max output** | 128k tokens | 128k tokens |¶
| **Pricing** | $10 / $50 per MTok (input / output) | $10 / $50 per MTok (input / output) |¶
¶
Claude Fable 5 is generally available on the Claude API, Claude Platform on AWS, Amazon Bedrock, Google Cloud, and Microsoft Foundry beginning June 9, 2026. Claude Mythos 5 is not generally available: it is offered in limited availability to approved customers in [Project Glasswing](https://anthropic.com/glasswing), beginning the same day. For access, contact your Anthropic, AWS, or Google Cloud account team.¶
¶
### Latest models comparison¶
¶
| Feature | Claude Opus 4.8 | Claude Sonnet 5 | Claude Haiku 4.5 |¶
| --------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------- |¶
| **Description** | Anthropic's most capable Opus-tier model for complex reasoning and agentic coding | The best combination of speed and intelligence | The fastest model with near-frontier intelligence |¶
| **Claude API ID** | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5-20251001 |¶
| **Claude API alias** | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5 |¶
| **AWS Bedrock ID** | anthropic.claude-opus-4-83 | `anthropic.claude-sonnet-5`3 | anthropic.claude-haiku-4-5-20251001-v1:0 |¶
| **Google Cloud ID** | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5\@20251001 |¶
| **Pricing**1 | $5 / input MTok $25 / output MTok | $3 / input MTok $15 / output MTok4 | $1 / input MTok $5 / output MTok |¶
| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | No | Yes |¶
| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes | Yes | No |¶
| **Comparative latency** | Moderate | Fast | Fastest |¶
| **Context window** | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~150k words \ ~680k unicode characters">200k tokens</Tooltip> |¶
| **Max output** | 128k tokens | 128k tokens | 64k tokens |¶
| **Reliable knowledge cutoff** | Jan 20262 | Jan 20262 | Feb 2025 |¶
| **Training data cutoff** | Jan 2026 | Jan 2026 | Jul 2025 |¶
¶
*1 - See [Pricing](/docs/en/about-claude/pricing) for complete pricing information including Batch API discounts and prompt caching rates.*¶
¶
*2 - **Reliable knowledge cutoff** indicates the date through which a model's knowledge is most extensive and reliable. **Training data cutoff** is the broader date range of training data used. For more information, see [Anthropic's Transparency Hub](https://www.anthropic.com/transparency).*¶
¶
*3 - Claude Opus 4.8 and Claude Sonnet 5 are available on Bedrock through [Claude in Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock) (the Messages-API Bedrock endpoint).*¶
¶
*4 - Introductory pricing of $2 / $10 per MTok applies to Claude Sonnet 5 through August 31, 2026. See [Pricing](/docs/en/about-claude/pricing#claude-sonnet-5-introductory-pricing).*¶
¶
<Info>¶
[Claude Mythos Preview](https://anthropic.com/glasswing) is offered separately as a research preview modelshares Claude Fable 5's specs and pricing and joins the invitation-only Claude Mythos Preview (`claude-mythos-preview`) within [Project Glasswing](https://anthropic.com/glasswing). See [Introducing Claude Fable 5 and Claude Mythos 5](/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5) for launch details and API changes.¶
¶
Claude Fable 5 is generally available on the Claude API, Claude Platform on AWS, Amazon Bedrock, Google Cloud, and Microsoft Foundry beginning June 9, 2026. Claude Mythos 5 is not generally available: it is offered in limited availability to approved customers in [Project Glasswing](https://anthropic.com/glasswing), beginning the same day. For access, contact your Anthropic, AWS, or Google Cloud account team.¶
¶
### Latest models comparison¶
¶
| Feature | Claude Fable 5 | Claude Opus 4.8 | Claude Sonnet 5 | Claude Haiku 4.5 |¶
| --------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------- |¶
| **Description** | Next-generation intelligence for long-running agents | For complex agentic coding and enterprise work | The best combination of speed and intelligence | The fastest model with near-frontier intelligence |¶
| **Claude API ID** | claude-fable-5 | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5-20251001 |¶
| **Claude API alias** | claude-fable-5 | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5 |¶
| **AWS Bedrock ID** | anthropic.claude-fable-53 | anthropic.claude-opus-4-83 | `anthropic.claude-sonnet-5`3 | anthropic.claude-haiku-4-5-20251001-v1:0 |¶
| **Google Cloud ID** | claude-fable-5 | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5\@20251001 |¶
| **Pricing**1 | $10 / input MTok $50 / output MTok | $5 / input MTok $25 / output MTok | $3 / input MTok $15 / output MTok4 | $1 / input MTok $5 / output MTok |¶
| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | No | No | Yes |¶
| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes (always on) | Yes | Yes | No |¶
| **Comparative latency** | Slower | Moderate | Fast | Fastest |¶
| **Context window** | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters. Claude Fable 5 uses the tokenizer introduced with Claude Opus 4.7; compared to models before Claude Opus 4.7, the same text produces roughly 30% more tokens.">1M tokens</Tooltip> | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~150k words \ ~680k unicode characters">200k tokens</Tooltip> |¶
| **Max output** | 128k tokens | 128k tokens | 128k tokens | 64k tokens |¶
| **Reliable knowledge cutoff** | Jan 20262 | Jan 20262 | Jan 20262 | Feb 2025 |¶
| **Training data cutoff** | Jan 2026 | Jan 2026 | Jan 2026 | Jul 2025 |¶
¶
*1 - See [Pricing](/docs/en/about-claude/pricing) for complete pricing information including Batch API discounts and prompt caching rates.*¶
¶
*2 - **Reliable knowledge cutoff** indicates the date through which a model's knowledge is most extensive and reliable. **Training data cutoff** is the broader date range of training data used. For more information, see [Anthropic's Transparency Hub](https://www.anthropic.com/transparency).*¶
¶
*3 - Claude Fable 5, Claude Opus 4.8, and Claude Sonnet 5 are available on Bedrock through [Claude in Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock) (the Messages-API Bedrock endpoint).*¶
¶
*4 - Introductory pricing of $2 / $10 per MTok applies to Claude Sonnet 5 through August 31, 2026. See [Pricing](/docs/en/about-claude/pricing#claude-sonnet-5-introductory-pricing).*¶
¶
<Info>¶
Claude Mythos 5 and Claude Mythos Preview are offered separately for defensive cybersecurity workflows as part of [Project Glasswing](https://anthropic.com/glasswing). Access is invitation-only and there is no self-serve sign-up.¶
</Info>¶
¶
<Note>¶
Every Claude model ID is a pinned snapshot. Models with a date in the ID (for example, ¶
¶
`20250929`¶
¶
) are fixed to that specific release. Starting with the Claude 4.6 generation, model IDs use a dateless format that is also a pinned snapshot, not an evergreen pointer. For models before the 4.6 generation, entries in the Claude API alias column are convenience pointers that resolve to a dated model ID. For details on the naming convention and how versioning works, see ¶
¶
[Model IDs and versioning](/docs/en/about-claude/models/model-ids-and-versions)¶
¶
.¶
</Note>¶
¶
<Note>¶
Starting with ¶
¶
**Claude Sonnet 4.5 and all subsequent models**¶
¶
(including Claude Sonnet 4.6), Bedrock offers two endpoint types: ¶
¶
**global endpoints**¶
¶
(dynamic routing for maximum availability) and ¶
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**regional endpoints**¶
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(guaranteed data routing through specific geographic regions). Google Cloud offers three endpoint types: global endpoints, ¶
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**multi-region endpoints**¶
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(dynamic routing within a geographic area), and regional endpoints. For more information, see ¶
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[Cloud platform pricing](/docs/en/about-claude/pricing#cloud-platform-pricing)¶
¶
.¶
</Note>¶
¶
<Note>¶
**Claude Platform on AWS**¶
¶
uses the same model IDs as the Claude API (for example, ¶
¶
`claude-opus-4-6`¶
¶
), not Bedrock-style IDs. Model lifecycle on Claude Platform on AWS follows Anthropic's first-party ¶
¶
[Model deprecations](/docs/en/about-claude/model-deprecations)¶
¶
, not Bedrock's. See ¶
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[Available models](/docs/en/build-with-claude/claude-platform-on-aws#available-models)¶
¶
for the model list.¶
</Note>¶
¶
<Tip>¶
You can query model capabilities and token limits programmatically with the [Models API](/docs/en/api/models/list). The response includes `max_input_tokens`, `max_tokens`, and a `capabilities` object for every available model.¶
</Tip>¶
¶
<Note>¶
On Claude Opus 4.8, the `effort` parameter defaults to `high` on all surfaces, including the Claude API, Claude Code, and claude.ai. On Claude Sonnet 5, it defaults to `high` on the Claude API and Claude Code. Set `effort` explicitly to use a different level. See [Effort](/docs/en/build-with-claude/effort) for guidance on choosing a level.¶
</Note>¶
¶
<Note>¶
The Max output values above apply to the synchronous Messages API. On the [Message Batches API](/docs/en/build-with-claude/batch-processing#extended-output-beta), Claude Opus 4.8, Opus 4.7, Opus 4.6, Sonnet 5, and Sonnet 4.6 support up to 300k output tokens by using the `output-300k-2026-03-24` beta header.¶
</Note>¶
¶
<AccordionGroup>¶
<Accordion title="Legacy models">¶
The following models are still available. Consider migrating to current models for improved performance:¶
¶
| Feature | Claude Opus 4.7 | Claude Opus 4.6 | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Claude Opus 4.5 | Claude Opus 4.1 (deprecated) |¶
| --------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- |¶
| **Claude API ID** | claude-opus-4-7 | claude-opus-4-6 | claude-sonnet-4-6 | claude-sonnet-4-5-20250929 | claude-opus-4-5-20251101 | claude-opus-4-1-20250805 |¶
| **Claude API alias** | claude-opus-4-7 | claude-opus-4-6 | claude-sonnet-4-6 | claude-sonnet-4-5 | claude-opus-4-5 | claude-opus-4-1 |¶
| **AWS Bedrock ID** | anthropic.claude-opus-4-76 | anthropic.claude-opus-4-6-v1 | anthropic.claude-sonnet-4-6 | anthropic.claude-sonnet-4-5-20250929-v1:0 | anthropic.claude-opus-4-5-20251101-v1:0 | anthropic.claude-opus-4-1-20250805-v1:0 |¶
| **Google Cloud ID** | claude-opus-4-7 | claude-opus-4-6 | claude-sonnet-4-6 | claude-sonnet-4-5\@20250929 | claude-opus-4-5\@20251101 | claude-opus-4-1\@20250805 |¶
| **Pricing** | $5 / input MTok $25 / output MTok | $5 / input MTok $25 / output MTok | $3 / input MTok $15 / output MTok | $3 / input MTok $15 / output MTok | $5 / input MTok $25 / output MTok | $15 / input MTok $75 / output MTok |¶
| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | Yes | Yes | Yes | Yes | Yes |¶
| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes | Yes | Yes | No | No | No |¶
| **Comparative latency** | Moderate | Moderate | Fast | Fast | Moderate | Moderate |¶
| **Context window** | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters (Opus 4.7 uses a new tokenizer)">1M tokens</Tooltip> | <Tooltip tooltipContent="~750k words \ ~3.4M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~750k words \ ~3.4M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~150k words \ ~680k unicode characters">200k tokens</Tooltip> | <Tooltip tooltipContent="~150k words \ ~680k unicode characters">200k tokens</Tooltip> | <Tooltip tooltipContent="~150k words \ ~680k unicode characters">200k tokens</Tooltip> |¶
| **Max output** | 128k tokens | 128k tokens | 128k tokens | 64k tokens | 64k tokens | 32k tokens |¶
| **Reliable knowledge cutoff** | Jan 20265 | May 20255 | Aug 20255 | Jan 20255 | May 20255 | Jan 20255 |¶
| **Training data cutoff** | Jan 2026 | Aug 2025 | Jan 2026 | Jul 2025 | Aug 2025 | Mar 2025 |¶
¶
<Warning>¶
Claude Opus 4.1 (`claude-opus-4-1-20250805`) is deprecated and will be retired on August 5, 2026. Migrate to [Claude Opus 4.8](/docs/en/about-claude/models/migration-guide#migrating-from-claude-opus-47) before the retirement date.¶
¶
See [model deprecations](/docs/en/about-claude/model-deprecations) for details.¶
</Warning>¶
¶
*5 - **Reliable knowledge cutoff** indicates the date through which a model's knowledge is most extensive and reliable. **Training data cutoff** is the broader date range of training data used.*¶
¶
*6 - Claude Opus 4.7 is available on Bedrock through [Claude in Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock) (the Messages-API Bedrock endpoint).*¶
</Accordion>¶
</AccordionGroup>¶
¶
## Prompt and output performance¶
¶
Claude 4 models excel in:¶
¶
* **Performance:**: Top-tier results in reasoning, coding, multilingual tasks, long-context handling, honesty, and image processing. See the [Claude 4 blog post](https://www.anthropic.com/news/claude-4) for more information.¶
¶
* **Engaging responses:**: Claude models are ideal for applications that require rich, human-like interactions.¶
¶
* If you prefer more concise responses, you can adjust your prompts to guide the model toward the desired output length. Refer to the [prompt engineering guides](/docs/en/build-with-claude/prompt-engineering) for details.¶
* For prompting best practices, see [Prompting best practices](/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices).¶
¶
* **Output quality:**: When migrating from previous model generations to Claude 4, you may notice larger improvements in overall performance.¶
¶
## Migrating to Claude Opus 4.8¶
¶
If you're currently using Claude Opus 4.7 or earlier Claude models, see [Migrating to Claude Opus 4.8](/docs/en/about-claude/models/migration-guide#migrating-from-claude-opus-47).¶
¶
## Migrating to Claude Opus 4.7¶
¶
If you're currently using Claude Opus 4.6 or older Claude models, see [Migrating to Claude Opus 4.7](/docs/en/about-claude/models/migration-guide#migrating-to-claude-opus-4-7).¶
¶
## Get started with Claude¶
¶
If you're ready to start exploring what Claude can do for you, dive in! Whether you're a developer looking to integrate Claude into your applications or a user wanting to experience the power of AI firsthand, the following resources can help.¶
¶
<Note>¶
Looking to chat with Claude? Visit ¶
¶
[claude.ai](https://claude.ai)¶
¶
!¶
</Note>¶
¶
<CardGroup cols={3}>¶
<Card title="Intro to Claude" icon="check" href="/docs/en/intro">¶
Explore Claude's capabilities and development flow.¶
</Card>¶
¶
<Card title="Quickstart" icon="lightning" href="/docs/en/get-started">¶
Learn how to make your first API call in minutes.¶
</Card>¶
¶
<Card title="Claude Console" icon="code" href="/">¶
Craft and test powerful prompts directly in your browser.¶
</Card>¶
</CardGroup>¶
¶
If you have any questions or need assistance, don't hesitate to reach out to the [support team](https://support.claude.com/) or consult the [Discord community](https://www.anthropic.com/discord).¶
Unified Diff
--- a/about-claude/models/overview.md
+++ b/about-claude/models/overview.md
@@ -6,7 +6,7 @@
## Choosing a model
-If you're unsure which model to use, consider starting with **Claude Opus 4.8** for the most complex tasks. It is Anthropic's most capable Opus-tier model for complex reasoning, long-horizon agentic coding, and high-autonomy work. For workloads that need the highest available capability, see [Claude Fable 5](#claude-fable-5-and-claude-mythos-5).
+If you're unsure which model to use, start with **Claude Opus 4.8** for complex agentic coding and enterprise work. For workloads that need the highest available capability, use [Claude Fable 5](#claude-fable-5-and-claude-mythos-5).
All current Claude models support text and image input, text output, multilingual capabilities, and vision. Models are available through the Claude API, [Claude Platform on AWS](/docs/en/build-with-claude/claude-platform-on-aws), [Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock), [Google Cloud](/docs/en/build-with-claude/claude-on-vertex-ai), and [Microsoft Foundry](/docs/en/build-with-claude/claude-in-microsoft-foundry).
@@ -14,50 +14,38 @@
### Claude Fable 5 and Claude Mythos 5
-Claude Fable 5 (`claude-fable-5`) is Anthropic's most capable widely released model. Claude Mythos 5 (`claude-mythos-5`) joins the invitation-only Claude Mythos Preview (`claude-mythos-preview`) within [Project Glasswing](https://anthropic.com/glasswing). See [Introducing Claude Fable 5 and Claude Mythos 5](/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5) for launch details and API changes.
-
-| Feature | Claude Fable 5 | Claude Mythos 5 |
-| --------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
-| **Description** | Anthropic's most capable widely released model, for the most demanding reasoning and long-horizon agentic work | Available through Project Glasswing. Successor to Claude Mythos Preview. |
-| **Claude API ID** | `claude-fable-5` | `claude-mythos-5` |
-| **AWS Bedrock ID** | anthropic.claude-fable-5 | Limited availability |
-| **Google Cloud ID** | claude-fable-5 | Limited availability |
-| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | No |
-| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes (always on) | Yes (always on) |
-| **Context window** | <Tooltip tooltipContent="Claude Fable 5 and Claude Mythos 5 use the tokenizer introduced with Claude Opus 4.7. Compared to models before Claude Opus 4.7, the same text produces roughly 30% more tokens.">1M tokens</Tooltip> | <Tooltip tooltipContent="Claude Fable 5 and Claude Mythos 5 use the tokenizer introduced with Claude Opus 4.7. Compared to models before Claude Opus 4.7, the same text produces roughly 30% more tokens.">1M tokens</Tooltip> |
-| **Max output** | 128k tokens | 128k tokens |
-| **Pricing** | $10 / $50 per MTok (input / output) | $10 / $50 per MTok (input / output) |
+Claude Fable 5 (`claude-fable-5`) is Anthropic's most capable widely released model. Claude Mythos 5 (`claude-mythos-5`) shares Claude Fable 5's specs and pricing and joins the invitation-only Claude Mythos Preview (`claude-mythos-preview`) within [Project Glasswing](https://anthropic.com/glasswing). See [Introducing Claude Fable 5 and Claude Mythos 5](/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5) for launch details and API changes.
Claude Fable 5 is generally available on the Claude API, Claude Platform on AWS, Amazon Bedrock, Google Cloud, and Microsoft Foundry beginning June 9, 2026. Claude Mythos 5 is not generally available: it is offered in limited availability to approved customers in [Project Glasswing](https://anthropic.com/glasswing), beginning the same day. For access, contact your Anthropic, AWS, or Google Cloud account team.
### Latest models comparison
-| Feature | Claude Opus 4.8 | Claude Sonnet 5 | Claude Haiku 4.5 |
-| --------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------- |
-| **Description** | Anthropic's most capable Opus-tier model for complex reasoning and agentic coding | The best combination of speed and intelligence | The fastest model with near-frontier intelligence |
-| **Claude API ID** | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5-20251001 |
-| **Claude API alias** | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5 |
-| **AWS Bedrock ID** | anthropic.claude-opus-4-83 | `anthropic.claude-sonnet-5`3 | anthropic.claude-haiku-4-5-20251001-v1:0 |
-| **Google Cloud ID** | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5\@20251001 |
-| **Pricing**1 | $5 / input MTok $25 / output MTok | $3 / input MTok $15 / output MTok4 | $1 / input MTok $5 / output MTok |
-| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | No | Yes |
-| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes | Yes | No |
-| **Comparative latency** | Moderate | Fast | Fastest |
-| **Context window** | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~150k words \ ~680k unicode characters">200k tokens</Tooltip> |
-| **Max output** | 128k tokens | 128k tokens | 64k tokens |
-| **Reliable knowledge cutoff** | Jan 20262 | Jan 20262 | Feb 2025 |
-| **Training data cutoff** | Jan 2026 | Jan 2026 | Jul 2025 |
+| Feature | Claude Fable 5 | Claude Opus 4.8 | Claude Sonnet 5 | Claude Haiku 4.5 |
+| --------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------- |
+| **Description** | Next-generation intelligence for long-running agents | For complex agentic coding and enterprise work | The best combination of speed and intelligence | The fastest model with near-frontier intelligence |
+| **Claude API ID** | claude-fable-5 | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5-20251001 |
+| **Claude API alias** | claude-fable-5 | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5 |
+| **AWS Bedrock ID** | anthropic.claude-fable-53 | anthropic.claude-opus-4-83 | `anthropic.claude-sonnet-5`3 | anthropic.claude-haiku-4-5-20251001-v1:0 |
+| **Google Cloud ID** | claude-fable-5 | claude-opus-4-8 | `claude-sonnet-5` | claude-haiku-4-5\@20251001 |
+| **Pricing**1 | $10 / input MTok $50 / output MTok | $5 / input MTok $25 / output MTok | $3 / input MTok $15 / output MTok4 | $1 / input MTok $5 / output MTok |
+| **[Extended thinking](/docs/en/build-with-claude/extended-thinking)** | No | No | No | Yes |
+| **[Adaptive thinking](/docs/en/build-with-claude/adaptive-thinking)** | Yes (always on) | Yes | Yes | No |
+| **Comparative latency** | Slower | Moderate | Fast | Fastest |
+| **Context window** | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters. Claude Fable 5 uses the tokenizer introduced with Claude Opus 4.7; compared to models before Claude Opus 4.7, the same text produces roughly 30% more tokens.">1M tokens</Tooltip> | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~555k words \ ~2.5M unicode characters">1M tokens</Tooltip> | <Tooltip tooltipContent="~150k words \ ~680k unicode characters">200k tokens</Tooltip> |
+| **Max output** | 128k tokens | 128k tokens | 128k tokens | 64k tokens |
+| **Reliable knowledge cutoff** | Jan 20262 | Jan 20262 | Jan 20262 | Feb 2025 |
+| **Training data cutoff** | Jan 2026 | Jan 2026 | Jan 2026 | Jul 2025 |
*1 - See [Pricing](/docs/en/about-claude/pricing) for complete pricing information including Batch API discounts and prompt caching rates.*
*2 - **Reliable knowledge cutoff** indicates the date through which a model's knowledge is most extensive and reliable. **Training data cutoff** is the broader date range of training data used. For more information, see [Anthropic's Transparency Hub](https://www.anthropic.com/transparency).*
-*3 - Claude Opus 4.8 and Claude Sonnet 5 are available on Bedrock through [Claude in Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock) (the Messages-API Bedrock endpoint).*
+*3 - Claude Fable 5, Claude Opus 4.8, and Claude Sonnet 5 are available on Bedrock through [Claude in Amazon Bedrock](/docs/en/build-with-claude/claude-in-amazon-bedrock) (the Messages-API Bedrock endpoint).*
*4 - Introductory pricing of $2 / $10 per MTok applies to Claude Sonnet 5 through August 31, 2026. See [Pricing](/docs/en/about-claude/pricing#claude-sonnet-5-introductory-pricing).*
<Info>
- [Claude Mythos Preview](https://anthropic.com/glasswing) is offered separately as a research preview model for defensive cybersecurity workflows as part of [Project Glasswing](https://anthropic.com/glasswing). Access is invitation-only and there is no self-serve sign-up.
+ Claude Mythos 5 and Claude Mythos Preview are offered separately for defensive cybersecurity workflows as part of [Project Glasswing](https://anthropic.com/glasswing). Access is invitation-only and there is no self-serve sign-up.
</Info>
<Note>
@@ -161,14 +149,14 @@
Claude 4 models excel in:
-* **Performance**: Top-tier results in reasoning, coding, multilingual tasks, long-context handling, honesty, and image processing. See the [Claude 4 blog post](https://www.anthropic.com/news/claude-4) for more information.
+* **Performance:** Top-tier results in reasoning, coding, multilingual tasks, long-context handling, honesty, and image processing. See the [Claude 4 blog post](https://www.anthropic.com/news/claude-4) for more information.
-* **Engaging responses**: Claude models are ideal for applications that require rich, human-like interactions.
+* **Engaging responses:** Claude models are ideal for applications that require rich, human-like interactions.
* If you prefer more concise responses, you can adjust your prompts to guide the model toward the desired output length. Refer to the [prompt engineering guides](/docs/en/build-with-claude/prompt-engineering) for details.
* For prompting best practices, see [Prompting best practices](/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices).
-* **Output quality**: When migrating from previous model generations to Claude 4, you may notice larger improvements in overall performance.
+* **Output quality:** When migrating from previous model generations to Claude 4, you may notice larger improvements in overall performance.
## Migrating to Claude Opus 4.8