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ActiveReleased Sep 1, 2026 Updated Sep 5, 2026

Claude Fable 5.1

By Anthropic

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COMMUNITY RATING Rate Claude Fable 5.1 Be the first to share a community rating.
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Technical Performance composite67.3/100 verified composite
Context window1000000tokens
Input price$10.00per 1M tokens
Output price$50.00per 1M tokens
MODEL OVERVIEW

About Claude Fable 5.1

Verified Claude API base pricing: $10 input / $50 output per 1M tokens. Cache and Batch API rates are separate.

Claude Fable 5.1 is provided by Anthropic. AI Orbit records its release date as September 1, 2026. The current profile lists a 1000000 context window.

Cataloged capabilities include Text Generation, Reasoning, Image Understanding, Code Generation, API Access, and Agent Workflows. AI Orbit maps the model to use cases including General AI Assistance, Writing & Editing, Summarization, Brainstorming, and Question Answering.

The current AI Orbit benchmark composite is 67.3/100. 8 verified benchmark results are linked to this profile, including AutomationBench, BenchCAD, Terminal-Bench 4.0, and DeepSWE v1.1.

AI Orbit currently lists $10.00 per 1M input tokens and $50.00 per 1M output tokens. Provider pricing can change, so production decisions should be checked against the linked official pricing source.

Related model coverage includes GPT-5, o3, GPT-5 mini, and Gemini 2.5 Pro. The profile also connects to current provider news when published intelligence is available.

ProviderAnthropic
ReleasedSep 1, 2026
Context window1000000
Benchmark composite67.3/100
Verified benchmarks8
ProviderAnthropic
Version—
Release dateSeptember 1, 2026
StatusActive
Context window1000000
Associated product—
PROFILE EVIDENCE COVERAGE50/1005/8 checks verified

This score measures how much of the profile AI Orbit can support with stored evidence. It is not a rating of the model's quality, intelligence or performance.

IdentityExact version mapping still required
ProfileProfile verification is incomplete
Official evidenceOfficial-source evidence linked
CapabilitiesCapability taxonomy populated
Release dateOfficial release date stored
Context windowContext specification stored
Pricing modelCommercial terms are not fully pinned
BenchmarksVerified benchmark evidence available
How AI Orbit verifies model data
WHAT IT CAN DO

Capabilities & use cases

Text GenerationGenerates original text from natural-language instructions or structured prompts.ReasoningSupports multi-step reasoning, planning, analysis and problem solving.Image UnderstandingInterprets images, screenshots, diagrams and other visual inputs.Code GenerationGenerates source code, functions, components or complete implementations.API AccessProvides programmatic API access for application integration.Agent WorkflowsPlans and executes multi-step tasks with tools, state or autonomous actions.Function CallingInvokes defined functions or tools with structured arguments.
Useful for
PERFORMANCE

Verified benchmark profile

AI Orbit only presents benchmark rows here when the underlying result is marked verified. Scores should still be interpreted alongside methodology and test date.

AutomationBenchTechnical Performance · OpenAI cross-provider evaluation
31.4
BenchCADTechnical Performance · OpenAI cross-provider evaluation
84.3
Terminal-Bench 4.0Technical Performance · OpenAI cross-provider evaluation
55.8
DeepSWE v1.1Technical Performance · OpenAI cross-provider evaluation
67.4
Terminal-Bench Science 0.1Technical Performance · OpenAI cross-provider evaluation
52.6
FrontierMath Tier 4 v2Technical Performance · OpenAI cross-provider evaluation
87.8
GPQA DiamondTechnical Performance · OpenAI cross-provider evaluation
93.7
Humanity's Last Exam (w/ tools)Technical Performance · OpenAI cross-provider evaluation
65.0
API ECONOMICS

Pricing & availability

Commercial terms are shown in the unit that actually applies to this model instead of forcing every model into text-token pricing.

Source observed · verification pending
Pricing modelToken API
Billing unitNot classified
Evidence statusSource linked · review pending
Input tokensPer 1 million tokens$10.00
Output tokensPer 1 million tokens$50.00
Verified economics evidence Official source
SOURCE TRANSPARENCY

Verification evidence

Official source coverage

AI Orbit separates structured evidence records, official provider links and benchmark-specific sources so missing evidence is not mistaken for a negative claim.

Official provider source linked

The profile is connected to an official provider page. Structured evidence records are shown separately when available.

Open source
Benchmark sources
COMMON QUESTIONS

Claude Fable 5.1 FAQ

Quick answers based on the verified information currently available in this model profile.

What is Claude Fable 5.1?

Verified Claude API base pricing: $10 input / $50 output per 1M tokens. Cache and Batch API rates are separate. Model ID: claude-fable-5-1. The current AI Orbit profile lists a 1000000 context window, released September 2026. Cataloged capabilities include Text Generation, Reasoning, Image Understanding, Code Generation, Function Calling and API Access. V...

Who created Claude Fable 5.1?

Claude Fable 5.1 is provided by Anthropic.

What can Claude Fable 5.1 do?

Its listed capabilities include Text Generation, Reasoning, Image Understanding, Code Generation, API Access.

What is Claude Fable 5.1 useful for?

AI Orbit currently maps Claude Fable 5.1 to use cases including General AI Assistance, Writing & Editing, Summarization, Brainstorming and Question Answering.

What is the context window of Claude Fable 5.1?

AI Orbit currently lists the context window as 1000000.

How much does Claude Fable 5.1 cost?

AI Orbit currently lists $10.00 per 1M input tokens and $50.00 per 1M output tokens. Provider pricing can change, so check the linked official pricing source before production use.

GUIDES & ANALYSIS

Research related to Claude Fable 5.1

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News AnalysisAug 28, 2026Anthropic Wins Court Challenge to Pentagon Blacklist: What the Ruling Means for AI Policy

A federal judge has ruled that the Pentagon unlawfully blacklisted Anthropic after a dispute over restrictions on m...

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