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Claude Fable 5 vs Claude Sonnet 5
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Scores
Intelligence (ECI)161—
Coding10094
Math97—
Reasoning & Knowledge9788
Agentic & Tools97—
Specifications
DeveloperAnthropicAnthropic
FamilyClaudeClaude
ReleasedJun 9, 2026Jun 30, 2026
Parameters——
AvailabilityAPI access—
Context window1M1M
Price — $/M input$10.00$2.00
Price — $/M output$50.00$10.00
Inputstext, image, filetext, image, file
Outputstexttext
Benchmarks
AIME 2024/2025100%—
APEX45%—
GPQA Diamond93%91%
Humanity's Last Exam53%40%
SciCode60%54%
SimpleBench82%—
SimpleQA Verified68%—
WebDev Arena1654—
WeirdML88%—
τ²-bench99%—
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.