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Claude Sonnet 4.6 vs DeepSeek-V3.2

2 vs 0 benchmarks won

Anthropic
Claude Sonnet 4.6
DeepSeek
DeepSeek-V3.2
Overview
CompanyAnthropicDeepSeek
Release dateFeb 17 2026Dec 1 2025
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-V3.2 shipped 78 days before Claude Sonnet 4.6

Which is better: Claude Sonnet 4.6 or DeepSeek-V3.2?

Claude Sonnet 4.6 leads DeepSeek-V3.2 on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). DeepSeek-V3.2 shipped 78 days before Claude Sonnet 4.6, so benchmark comparisons should account for the intervening progress.

DeepSeek-V3.2 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-V3.2 released?
DeepSeek-V3.2 was released by DeepSeek on Dec 1 2025.
Is Claude Sonnet 4.6 or DeepSeek-V3.2 open source?
DeepSeek-V3.2 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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