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Claude Haiku 4.5 vs DeepSeek Coder

2 vs 0 benchmarks won

Anthropic
Claude Haiku 4.5
DeepSeek
DeepSeek Coder
Overview
CompanyAnthropicDeepSeek
Release dateOct 15 2025Nov 2 2023
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
73%
Software engineering
SWE-Bench Verified
73.3%
Multimodal understanding
MMMU
Timeline
Release gapDeepSeek Coder shipped 713 days before Claude Haiku 4.5

Which is better: Claude Haiku 4.5 or DeepSeek Coder?

Claude Haiku 4.5 leads DeepSeek Coder on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). DeepSeek Coder shipped 713 days before Claude Haiku 4.5, so benchmark comparisons should account for the intervening progress.

DeepSeek Coder is an open-source / open-weight model; Claude Haiku 4.5 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 Haiku 4.5 released?
Claude Haiku 4.5 was released by Anthropic on Oct 15 2025.
When was DeepSeek Coder released?
DeepSeek Coder was released by DeepSeek on Nov 2 2023.
Is Claude Haiku 4.5 or DeepSeek Coder open source?
DeepSeek Coder is an open-source / open-weight model released by DeepSeek. Claude Haiku 4.5 is a proprietary model released by Anthropic.

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