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Gemini 3.1 Pro vs Kimi-Dev

2 vs 0 benchmarks won

Google
Gemini 3.1 Pro
Moonshot AI
Kimi-Dev
Overview
CompanyGoogleMoonshot AI
Release dateFeb 19 2026Jun 2025
Model type
Open sourceNoYes
Specifications
Parameters
72B
Context window
Benchmarks
Science reasoning
GPQA Diamond
94.3%
Software engineering
SWE-Bench Verified
80.6%
Multimodal understanding
MMMU
Timeline
Release gapKimi-Dev shipped 263 days before Gemini 3.1 Pro

Which is better: Gemini 3.1 Pro or Kimi-Dev?

Gemini 3.1 Pro leads Kimi-Dev on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Kimi-Dev shipped 263 days before Gemini 3.1 Pro, so benchmark comparisons should account for the intervening progress.

Kimi-Dev is an open-source / open-weight model; Gemini 3.1 Pro is proprietary.

Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Gemini 3.1 Pro released?
Gemini 3.1 Pro was released by Google on Feb 19 2026.
When was Kimi-Dev released?
Kimi-Dev was released by Moonshot AI on Jun 2025.
Is Gemini 3.1 Pro or Kimi-Dev open source?
Kimi-Dev is an open-source / open-weight model released by Moonshot AI. Gemini 3.1 Pro is a proprietary model released by Google.

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