Claude Fable 5.1

anthropic/claude-fable-5.1

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual code generation, and finance and analysis tasks in particular. It also tends to be more concise than Fable 5 in its plans and summaries. We recommend testing it as a direct upgrade wherever you use Fable 5 today, and alongside Opus 5 on reasoning-heavy tasks.

Model specifications

Input
text, image, file
Output
text
Context
1,000,000 tokens
Max output
128,000 tokens
Input price
0 / 1M tokens
Output price
$50 / 1M tokens
Released
2026-09-02

Capabilities

  • Streaming
  • Function calling
  • Vision
  • JSON mode

Provider pricing, discounts and data privacy

Compare effective provider prices, published discounts, regions, retention policies, training use, compliance, and privacy links by service tier.

Standard service tier

2 available providers · tier input average 0 / 1M tokens · tier output average $50 / 1M tokens

Amazon Bedrock

Tier: Standard · Region: US

Pricing
Input
0 / 1M tokens
Output
$50 / 1M tokens
Cache read
$0.25 / 1M tokens
Cache write
2.5 / 1M tokens

No provider discount is currently published.

Data privacy and compliance
Region
US
Zero data retention
Yes
Data retention
Zero retention
Used for training
No
Data collection
Moderated
No
GDPR compliant
Yes
HIPAA compliant
Yes
SOC 2 certified
Yes
BYOK supported
Yes

Privacy policy · Terms · Official website · Documentation · Status · Support

Anthropic

Tier: Standard · Region: US

Pricing
Input
0 / 1M tokens
Output
$50 / 1M tokens
Cache read
$0.25 / 1M tokens
Cache write
2.5 / 1M tokens

No provider discount is currently published.

Data privacy and compliance
Region
US
Zero data retention
Yes
Data retention
Zero retention
Used for training
No
Data collection
Moderated
No
GDPR compliant
Yes
HIPAA compliant
Yes
SOC 2 certified
Yes
BYOK supported
Yes

Privacy policy · Terms · Official website · Documentation · Status · Support

Frequently asked questions

What is Claude Fable 5.1?
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual code generation, and finance and analysis tasks in particular. It also tends to be more concise than Fable 5 in its plans and summaries. We recommend testing it as a direct upgrade wherever you use Fable 5 today, and alongside Opus 5 on reasoning-heavy tasks.
How much does Claude Fable 5.1 cost?
Input costs start at 0 / 1M tokens and output costs start at $50 / 1M tokens. Provider-level prices vary by service tier.
What is the context length of Claude Fable 5.1?
Claude Fable 5.1 supports a 1,000,000 token context window and up to 128,000 output tokens.
What capabilities does Claude Fable 5.1 support?
Claude Fable 5.1 supports Streaming, Function calling, Vision, JSON mode.
Which providers offer Claude Fable 5.1?
Claude Fable 5.1 is available from Amazon Bedrock, Anthropic.
How do providers handle data privacy for Claude Fable 5.1?
2 of 2 providers report that customer data is not used for training, and 2 offer zero-data-retention routing. Retention, compliance, and privacy-policy links are listed per provider.

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