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GPT-5.6 Sol vs Grok 4.1 Fast

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GPT-5.6 SolGrok 4.1 Fast
AttributeGPT-5.6 SolOpenAI · 15 in the newsGrok 4.1 FastxAI
Scores
Intelligence (ECI)162
Coding9540
Math9748
Reasoning & Knowledge9549
Agentic & Tools6645
Specifications
DeveloperOpenAIxAI
FamilyGPTGrok
ReleasedJul 9, 2026Nov 19, 2025
Parameters
AvailabilityAPI accessAPI access
Context window1.1M
Price — $/M input$5.00
Price — $/M output$30.00
Inputsfile, image, text
Outputstext
Benchmarks
AIME 2024/2025100%89%
APEX40%13%
ARC-AGI98%
ARC-AGI-293%
GPQA Diamond93%85%
Humanity's Last Exam47%18%
SciCode56%44%
SimpleBench72%56%
SimpleQA Verified72%
WebDev Arena16201223
WeirdML89%
τ²-bench85%93%
LiveCodeBench82%
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.