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Gemini 3.1 Pro vs GPT-5.5
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Scores
Intelligence (ECI)156159
Coding7189
Math7697
Reasoning & Knowledge9691
Agentic & Tools8895
Specifications
DeveloperGoogle DeepMindOpenAI
FamilyGeminiGPT
ReleasedFeb 19, 2026Apr 23, 2026
Parameters——
AvailabilityAPI accessAPI access
Context window—1.1M
Price — $/M input—$5.00
Price — $/M output—$30.00
Inputs—file, image, text
Outputs—text
Benchmarks
AIME 2024/202596%100%
APEX34%38%
ARC-AGI98%95%
ARC-AGI-277%85%
FrontierMath37%52%
FrontierMath Tier 417%35%
GPQA Diamond94%94%
GSO (code optimization)23%40%
Humanity's Last Exam46%—
METR task horizon6.4 h—
SimpleBench80%69%
SimpleQA Verified77%63%
SWE-bench Verified76%81%
Terminal-Bench80%85%
WebDev Arena14611505
WeirdML72%85%
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.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.