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Claude Fable 5 vs GPT-5

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Claude Fable 5GPT-5
AttributeClaude Fable 5Anthropic · 42 in the newsGPT-5OpenAI · 41 in the news
Scores
Intelligence (ECI)162150
Coding9942
Math9568
Reasoning & Knowledge9654
Agentic & Tools9832
Specifications
DeveloperAnthropicOpenAI
FamilyClaudeGPT
ReleasedJun 9, 2026Aug 7, 2025
Parameters
AvailabilityAPI accessAPI access
Context window1M400K
Price — $/M input$10.00$1.25
Price — $/M output$50.00$10.00
Inputstext, image, filetext, image, file
Outputstexttext
Benchmarks
AIME 2024/2025100%91%
APEX45%18%
GPQA Diamond93%86%
Humanity's Last Exam53%25%
SciCode60%43%
SimpleBench82%57%
SimpleQA Verified68%51%
WebDev Arena16541395
WeirdML92%61%
τ²-bench99%85%
ARC-AGI66%
ARC-AGI-210%
FrontierMath32%
FrontierMath Tier 413%
GDPval (win/tie rate)38%
GSO (code optimization)7%
LiveCodeBench85%
MATH Level 598%
METR task horizon3.4 h
MMLU-Pro87%
SWE-bench Verified74%
Terminal-Bench50%

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.