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GPT-5.1-Codex vs Grok 4.6

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GPT-5.1-CodexGrok 4.6
AttributeGPT-5.1-CodexOpenAI · 2 in the newsGrok 4.6xAI · 3 in the news
Scores
Intelligence (ECI)156
Coding4290
Math7591
Reasoning & Knowledge5473
Agentic & Tools3895
Specifications
DeveloperOpenAIxAI
FamilyGPTGrok
ReleasedNov 12, 2025Aug 12, 2026
Parameters
AvailabilityAPI accessAPI access
Context window400K500K
Price — $/M input$1.25$2.00
Price — $/M output$10.00$6.00
Inputstext, imagetext, image, file
Outputstexttext
Benchmarks
AIME 2024/202596%99%
APEX21%65%
GPQA Diamond86%94%
Humanity's Last Exam26%43%
LiveCodeBench85%
MMLU-Pro86%
SciCode40%56%
Terminal-Bench58%
WebDev Arena13361618
τ²-bench83%
ARC-AGI88%
ARC-AGI-267%
SimpleBench76%
SimpleQA Verified49%
WeirdML67%

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.