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Claude 3 Haiku vs DeepSeek V3.1 Terminus

1 vs 0 benchmarks won

Anthropic
Claude 3 Haiku
DeepSeek
DeepSeek V3.1 Terminus
Overview
CompanyAnthropicDeepSeek
Release dateMar 4 2024Sep 22 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
33.3%
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapClaude 3 Haiku shipped 567 days before DeepSeek V3.1 Terminus

Which is better: Claude 3 Haiku or DeepSeek V3.1 Terminus?

Claude 3 Haiku leads DeepSeek V3.1 Terminus on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude 3 Haiku shipped 567 days before DeepSeek V3.1 Terminus, so benchmark comparisons should account for the intervening progress.

DeepSeek V3.1 Terminus is an open-source / open-weight model; Claude 3 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 Haiku released?
Claude 3 Haiku was released by Anthropic on Mar 4 2024.
When was DeepSeek V3.1 Terminus released?
DeepSeek V3.1 Terminus was released by DeepSeek on Sep 22 2025.
Is Claude 3 Haiku or DeepSeek V3.1 Terminus open source?
DeepSeek V3.1 Terminus is an open-source / open-weight model released by DeepSeek. Claude 3 Haiku is a proprietary model released by Anthropic.

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