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Gemini 1.5 Flash vs Kimi K2 (0905)

0 vs 2 benchmarks won

Google
Gemini 1.5 Flash
Moonshot AI
Kimi K2 (0905)
Overview
CompanyGoogleMoonshot AI
Release dateMay 14 2024Sep 5 2025
Model type
Open sourceNoYes
Specifications
Parameters
1T
Context window
256k
Benchmarks
Science reasoning
GPQA Diamond
75.1%
Software engineering
SWE-Bench Verified
65.8%
Multimodal understanding
MMMU
Timeline
Release gapGemini 1.5 Flash shipped 479 days before Kimi K2 (0905)

Which is better: Gemini 1.5 Flash or Kimi K2 (0905)?

Kimi K2 (0905) leads Gemini 1.5 Flash on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Gemini 1.5 Flash shipped 479 days before Kimi K2 (0905), so benchmark comparisons should account for the intervening progress.

Kimi K2 (0905) is an open-source / open-weight model; Gemini 1.5 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 1.5 Flash released?
Gemini 1.5 Flash was released by Google on May 14 2024.
When was Kimi K2 (0905) released?
Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
Is Gemini 1.5 Flash or Kimi K2 (0905) open source?
Kimi K2 (0905) is an open-source / open-weight model released by Moonshot AI. Gemini 1.5 Flash is a proprietary model released by Google.

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