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DeepSeek V3 Base vs Gemini 3.1 Flash-Lite

DeepSeek DeepSeek V3 Base vs Google Gemini 3.1 Flash-Lite — side-by-side specs.

DeepSeek
DeepSeek V3 Base
Google
Gemini 3.1 Flash-Lite
Overview
CompanyDeepSeekGoogle
Release dateDec 2024Mar 3 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 V3 Base shipped 457 days before Gemini 3.1 Flash-Lite

Which is better: DeepSeek V3 Base or Gemini 3.1 Flash-Lite?

DeepSeek V3 Base and Gemini 3.1 Flash-Lite do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. DeepSeek V3 Base shipped 457 days before Gemini 3.1 Flash-Lite, so benchmark comparisons should account for the intervening progress.

DeepSeek V3 Base is an open-source / open-weight model; Gemini 3.1 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 Base released?
DeepSeek V3 Base was released by DeepSeek on Dec 2024.
When was Gemini 3.1 Flash-Lite released?
Gemini 3.1 Flash-Lite was released by Google on Mar 3 2026.
Is DeepSeek V3 Base or Gemini 3.1 Flash-Lite open source?
DeepSeek V3 Base is an open-source / open-weight model released by DeepSeek. Gemini 3.1 Flash-Lite is a proprietary model released by Google.

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