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Gemini 2.5 Flash-Lite vs Devstral 2 (123B)

Google Gemini 2.5 Flash-Lite vs Mistral Devstral 2 (123B) — side-by-side specs.

Google
Gemini 2.5 Flash-Lite
Mistral
Devstral 2 (123B)
Overview
CompanyGoogleMistral
Release dateJun 17 2025Dec 9 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapGemini 2.5 Flash-Lite shipped 175 days before Devstral 2 (123B)

Which is better: Gemini 2.5 Flash-Lite or Devstral 2 (123B)?

Gemini 2.5 Flash-Lite and Devstral 2 (123B) do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Gemini 2.5 Flash-Lite shipped 175 days before Devstral 2 (123B), so benchmark comparisons should account for the intervening progress.

Devstral 2 (123B) is an open-source / open-weight model; Gemini 2.5 Flash-Lite 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-Lite released?
Gemini 2.5 Flash-Lite was released by Google on Jun 17 2025.
When was Devstral 2 (123B) released?
Devstral 2 (123B) was released by Mistral on Dec 9 2025.
Is Gemini 2.5 Flash-Lite or Devstral 2 (123B) open source?
Devstral 2 (123B) is an open-source / open-weight model released by Mistral. Gemini 2.5 Flash-Lite is a proprietary model released by Google.

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