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Claude Sonnet 4.6 vs DeepSeek Coder

2 vs 0 benchmarks won

Anthropic
Claude Sonnet 4.6
DeepSeek
DeepSeek Coder
Overview
CompanyAnthropicDeepSeek
Release dateFeb 17 2026Nov 2 2023
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
89.9%
Software engineering
SWE-Bench Verified
79.6%
Multimodal understanding
MMMU
Timeline
Release gapDeepSeek Coder shipped 838 days before Claude Sonnet 4.6

Which is better: Claude Sonnet 4.6 or DeepSeek Coder?

Claude Sonnet 4.6 leads DeepSeek Coder on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). DeepSeek Coder shipped 838 days before Claude Sonnet 4.6, so benchmark comparisons should account for the intervening progress.

DeepSeek Coder is an open-source / open-weight model; Claude Sonnet 4.6 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 Sonnet 4.6 released?
Claude Sonnet 4.6 was released by Anthropic on Feb 17 2026.
When was DeepSeek Coder released?
DeepSeek Coder was released by DeepSeek on Nov 2 2023.
Is Claude Sonnet 4.6 or DeepSeek Coder open source?
DeepSeek Coder is an open-source / open-weight model released by DeepSeek. Claude Sonnet 4.6 is a proprietary model released by Anthropic.

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