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DeepSeek R1-0528 vs Gemini 2.5 Flash

DeepSeek DeepSeek R1-0528 vs Google Gemini 2.5 Flash — side-by-side specs.

DeepSeek
DeepSeek R1-0528
Google
Gemini 2.5 Flash
Overview
CompanyDeepSeekGoogle
Release dateMay 28 2025Apr 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 shipped 41 days before DeepSeek R1-0528

Which is better: DeepSeek R1-0528 or Gemini 2.5 Flash?

DeepSeek R1-0528 and Gemini 2.5 Flash do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Gemini 2.5 Flash shipped 41 days before DeepSeek R1-0528, so benchmark comparisons should account for the intervening progress.

DeepSeek R1-0528 is an open-source / open-weight model; Gemini 2.5 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 DeepSeek R1-0528 released?
DeepSeek R1-0528 was released by DeepSeek on May 28 2025.
When was Gemini 2.5 Flash released?
Gemini 2.5 Flash was released by Google on Apr 17 2025.
Is DeepSeek R1-0528 or Gemini 2.5 Flash open source?
DeepSeek R1-0528 is an open-source / open-weight model released by DeepSeek. Gemini 2.5 Flash is a proprietary model released by Google.

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