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DeepSeek V3.1 Terminus vs Gemini 2.5 Flash-Lite

DeepSeek DeepSeek V3.1 Terminus vs Google Gemini 2.5 Flash-Lite — side-by-side specs.

DeepSeek
DeepSeek V3.1 Terminus
Google
Gemini 2.5 Flash-Lite
Overview
CompanyDeepSeekGoogle
Release dateSep 22 2025Jun 17 2025
Model type
Open sourceYesNo
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 97 days before DeepSeek V3.1 Terminus

Which is better: DeepSeek V3.1 Terminus or Gemini 2.5 Flash-Lite?

DeepSeek V3.1 Terminus and Gemini 2.5 Flash-Lite do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Gemini 2.5 Flash-Lite shipped 97 days before DeepSeek V3.1 Terminus, so benchmark comparisons should account for the intervening progress.

DeepSeek V3.1 Terminus 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 DeepSeek V3.1 Terminus released?
DeepSeek V3.1 Terminus was released by DeepSeek on Sep 22 2025.
When was Gemini 2.5 Flash-Lite released?
Gemini 2.5 Flash-Lite was released by Google on Jun 17 2025.
Is DeepSeek V3.1 Terminus or Gemini 2.5 Flash-Lite open source?
DeepSeek V3.1 Terminus is an open-source / open-weight model released by DeepSeek. Gemini 2.5 Flash-Lite is a proprietary model released by Google.

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