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Claude Fable 5 vs Grok 4.5

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Claude Fable 5Grok 4.5
AttributeClaude Fable 5Anthropic · 25 in the newsGrok 4.5xAI · 4 in the news
Scores
Intelligence (ECI)161
Coding10093
Math97
Reasoning & Knowledge9692
Agentic & Tools97
Specifications
DeveloperAnthropicxAI
FamilyClaudeGrok
ReleasedJun 9, 2026Jul 8, 2026
Parameters
AvailabilityAPI access
Context window1M500K
Price — $/M input$10.00$2.00
Price — $/M output$50.00$6.00
Inputstext, image, filetext, image, file
Outputstexttext
Benchmarks
AIME 2024/2025100%
APEX45%
GPQA Diamond93%93%
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.

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