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Gemini 2.5 Flash vs Kimi K2 Thinking

0 vs 1 benchmarks won

Google
Gemini 2.5 Flash
Moonshot AI
Kimi K2 Thinking
Overview
CompanyGoogleMoonshot AI
Release dateApr 17 2025Nov 6 2025
Model type
Open sourceNoYes
Specifications
Parameters
1T
Context window
256k
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
71.3%
Multimodal understanding
MMMU
Timeline
Release gapGemini 2.5 Flash shipped 203 days before Kimi K2 Thinking

Which is better: Gemini 2.5 Flash or Kimi K2 Thinking?

Kimi K2 Thinking leads Gemini 2.5 Flash on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Gemini 2.5 Flash shipped 203 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.

Kimi K2 Thinking is an open-source / open-weight model; Gemini 2.5 Flash 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 2.5 Flash released?
Gemini 2.5 Flash was released by Google on Apr 17 2025.
When was Kimi K2 Thinking released?
Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Is Gemini 2.5 Flash or Kimi K2 Thinking open source?
Kimi K2 Thinking is an open-source / open-weight model released by Moonshot AI. Gemini 2.5 Flash is a proprietary model released by Google.

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