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Claude 3.5 Haiku vs DeepSeek V3.1

2 vs 0 benchmarks won

Anthropic
Claude 3.5 Haiku
DeepSeek
DeepSeek V3.1
Overview
CompanyAnthropicDeepSeek
Release dateOct 22 2024Aug 21 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
41.6%
Software engineering
SWE-Bench Verified
40.6%
Multimodal understanding
MMMU
Timeline
Release gapClaude 3.5 Haiku shipped 303 days before DeepSeek V3.1

Which is better: Claude 3.5 Haiku or DeepSeek V3.1?

Claude 3.5 Haiku leads DeepSeek V3.1 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude 3.5 Haiku shipped 303 days before DeepSeek V3.1, so benchmark comparisons should account for the intervening progress.

DeepSeek V3.1 is an open-source / open-weight model; Claude 3.5 Haiku 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 3.5 Haiku released?
Claude 3.5 Haiku was released by Anthropic on Oct 22 2024.
When was DeepSeek V3.1 released?
DeepSeek V3.1 was released by DeepSeek on Aug 21 2025.
Is Claude 3.5 Haiku or DeepSeek V3.1 open source?
DeepSeek V3.1 is an open-source / open-weight model released by DeepSeek. Claude 3.5 Haiku is a proprietary model released by Anthropic.

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