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Gemini 3.1 Pro vs GLM-5.1

Gemini 3.1 Pro (Google DeepMind) and GLM-5.1 (Z.ai (Zhipu AI)) compared on benchmarks, pricing, context window, and use-case rankings.

Gemini 3.1 ProGoogle DeepMind · 2 in the newsGLM-5.1Z.ai (Zhipu AI) · 5 in the news
Scores
Intelligence (ECI)156150
Coding7169
Math7663
Reasoning & Knowledge9648
Agentic & Tools88
Specifications
DeveloperGoogle DeepMindZ.ai (Zhipu AI)
FamilyGemini
ReleasedFeb 19, 2026Apr 7, 2026
Parameters754B
AvailabilityAPI access
Context window203K
Price — $/M input$0.98
Price — $/M output$3.08
Inputstext
Outputstext
Benchmarks
AIME 2024/202596%92%
APEX34%
ARC-AGI98%
ARC-AGI-277%
FrontierMath37%33%
FrontierMath Tier 417%13%
GPQA Diamond94%85%
GSO (code optimization)23%
Humanity's Last Exam46%
METR task horizon6.4 h
SimpleBench80%59%
SimpleQA Verified77%37%
SWE-bench Verified76%74%
Terminal-Bench80%
WebDev Arena14611534
WeirdML72%57%

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.

Frequently asked questions

Is Gemini 3.1 Pro better than GLM-5.1?

On Epoch AI's Capabilities Index, Gemini 3.1 Pro scores higher (156) than GLM-5.1 (150). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.

Which is better for coding, Gemini 3.1 Pro or GLM-5.1?

Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Gemini 3.1 Pro ranks higher — 71th vs 69th percentile among the models tracked on Model Beat.

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