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Claude Fable 5 vs Grok Build 0.1

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Claude Fable 5Grok Build 0.1
AttributeClaude Fable 5Anthropic · 48 in the newsGrok Build 0.1xAI
Scores
Intelligence (ECI)162
Coding98
Math97
Reasoning & Knowledge90
Agentic & Tools98
Specifications
DeveloperAnthropicxAI
FamilyClaudeGrok
ReleasedJun 9, 2026May 29, 2026
Parameters
AvailabilityAPI accessAPI access
Context window1M256K
Price — $/M input$10.00$1.00
Price — $/M output$50.00$2.00
Inputstext, image, filetext, image, file
Outputstexttext
Benchmarks
AIME 2024/2025100%
APEX45%
ARC-AGI99%
ARC-AGI-289%
GPQA Diamond86%
Humanity's Last Exam56%
SciCode60%
SimpleBench82%
SimpleQA Verified68%
WebDev Arena1654
WeirdML92%
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.