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Claude 2.1 vs DeepSeek-V4-Flash

0 vs 1 benchmarks won

Anthropic
Claude 2.1
DeepSeek
DeepSeek-V4-Flash
Overview
CompanyAnthropicDeepSeek
Release dateNov 21 2023Apr 24 2026
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
88.1%
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapClaude 2.1 shipped 885 days before DeepSeek-V4-Flash

Which is better: Claude 2.1 or DeepSeek-V4-Flash?

DeepSeek-V4-Flash leads Claude 2.1 on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude 2.1 shipped 885 days before DeepSeek-V4-Flash, so benchmark comparisons should account for the intervening progress.

DeepSeek-V4-Flash is an open-source / open-weight model; Claude 2.1 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 Claude 2.1 released?
Claude 2.1 was released by Anthropic on Nov 21 2023.
When was DeepSeek-V4-Flash released?
DeepSeek-V4-Flash was released by DeepSeek on Apr 24 2026.
Is Claude 2.1 or DeepSeek-V4-Flash open source?
DeepSeek-V4-Flash is an open-source / open-weight model released by DeepSeek. Claude 2.1 is a proprietary model released by Anthropic.

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