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Claude Fable 5 vs Cogito v2.1

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Claude Fable 5Cogito v2.1
AttributeClaude Fable 5Anthropic · 52 in the newsCogito v2.1Deep Cogito
Scores
Intelligence (ECI)163
Coding9626
Math9613
Reasoning & Knowledge8929
Agentic & Tools96
Specifications
DeveloperAnthropicDeep Cogito
FamilyClaude
ReleasedJun 9, 2026Nov 19, 2025
Parameters
AvailabilityAPI accessOpen weights (unrestricted)
Context window1M
Price — $/M input$10.00
Price — $/M output$50.00
Inputstext, image, file
Outputstext
Benchmarks
AIME 2024/2025100%73%
APEX45%
ARC-AGI99%
ARC-AGI-289%
GPQA Diamond86%77%
Humanity's Last Exam56%12%
SciCode61%41%
SimpleBench82%
SimpleQA Verified71%
WebDev Arena1626
WeirdML92%
τ²-bench99%
LiveCodeBench69%
MMLU-Pro85%

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.

Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.