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DeepSeek-LLM vs Gemini 3.1 Flash

DeepSeek DeepSeek-LLM vs Google Gemini 3.1 Flash — side-by-side specs.

DeepSeek
DeepSeek-LLM
Google
Gemini 3.1 Flash
Overview
CompanyDeepSeekGoogle
Release dateNov 29 2023Feb 26 2026
Model type
Open sourceYesNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapDeepSeek-LLM shipped 820 days before Gemini 3.1 Flash

Which is better: DeepSeek-LLM or Gemini 3.1 Flash?

DeepSeek-LLM and Gemini 3.1 Flash do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. DeepSeek-LLM shipped 820 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.

DeepSeek-LLM is an open-source / open-weight model; Gemini 3.1 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 DeepSeek-LLM released?
DeepSeek-LLM was released by DeepSeek on Nov 29 2023.
When was Gemini 3.1 Flash released?
Gemini 3.1 Flash was released by Google on Feb 26 2026.
Is DeepSeek-LLM or Gemini 3.1 Flash open source?
DeepSeek-LLM is an open-source / open-weight model released by DeepSeek. Gemini 3.1 Flash is a proprietary model released by Google.

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