Anthropic lists claude-fable-5-1 as active, released September 1, 2026. The earliest possible retirement date is not a deprecation announcement.
Historical
Common family use cases
Assumption · Read, analyze, or write · Read long documents · Solve problems or code
Family limitations
Assumption · Closed weights and API-dependent access.
Published ranking signals
Unknown · No comparable public ranking signal is currently linked to this exact version.
Verify the exact version before choosing: capabilities, price, context limits, latency, tools, and regional availability can differ by provider access path.
Assumption · OpenGPT catalog guidance
Best for
Complex workflows where the provider's broadest current capability is the priority.
Document analysis, writing, coding, and sustained long-context work.
Strengths
The flagship role is intended to represent the family's broadest current offering.
Claude Fable 5.1 is provider-listed as the flagship release in its model family.
Weaknesses
General availability does not guarantee identical capabilities across every product, account, or endpoint.
Verify exact capabilities, pricing, latency, context limits, tools, and regional availability with the provider.
Assumption · These points are OpenGPT decision guidance derived from provider-confirmed family, catalog role, and lifecycle information. They are not measured results for this exact version. Verify capabilities, pricing, latency, context limits, tools, and regional availability with the provider.
Model family
Family-level guidance
The following summary describes the broader model family from official positioning. It is not a measured result for this exact version.
CF
Assumption · Model family: Claude
Claude
A proprietary family positioned for analysis, writing, coding, and long-context work.
Read, analyze, or writeRead long documentsSolve problems or codeEveryday work
Well suited to document analysis and sustained written work. Offers managed models for coding and agentic workflows.
!
Family limitations
Closed weights and API-dependent access. Capabilities and limits differ substantially between model tiers.
Verify the exact version before choosing: capabilities, price, context limits, latency, tools, and regional availability can differ by provider access path.
Provider documentation and OpenGPT catalog classification are labeled separately.
Version differences
Compare two catalog model IDs from one model family. Provider IDs, sources and published ranking signals are shown; OpenGPT catalog classification is labeled separately.
No verified feature-difference data is available. OpenGPT does not infer speed, price, context length, or quality.
OFFICIAL MODEL PROFILE
Official resources
These links go to the provider. Availability and the selectable version can vary by product, account, region, and endpoint.
OFFICIAL MODEL PROFILE
Published ranking signals
Each row preserves one published metric and source. Scores from different sources are not interchangeable.
0
No comparable public ranking signal is currently linked to this exact version.
Missing data is not a zero score and does not mean the model is weak. It means this edition cannot safely attach a published result to the exact official version.
OpenGPTAI decision workspace