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Claude 3.5 Sonnet vs DeepSeek Chat (R1-based)

2 vs 0 benchmarks won

Anthropic
Claude 3.5 Sonnet
DeepSeek
DeepSeek Chat (R1-based)
Overview
CompanyAnthropicDeepSeek
Release dateJun 20 2024Jan 20 2025
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
59.4%
Software engineering
SWE-Bench Verified
33.4%
Multimodal understanding
MMMU
Timeline
Release gapClaude 3.5 Sonnet shipped 214 days before DeepSeek Chat (R1-based)

Which is better: Claude 3.5 Sonnet or DeepSeek Chat (R1-based)?

Claude 3.5 Sonnet leads DeepSeek Chat (R1-based) on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude 3.5 Sonnet shipped 214 days before DeepSeek Chat (R1-based), so benchmark comparisons should account for the intervening progress.

DeepSeek Chat (R1-based) is an open-source / open-weight model; Claude 3.5 Sonnet 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 Sonnet released?
Claude 3.5 Sonnet was released by Anthropic on Jun 20 2024.
When was DeepSeek Chat (R1-based) released?
DeepSeek Chat (R1-based) was released by DeepSeek on Jan 20 2025.
Is Claude 3.5 Sonnet or DeepSeek Chat (R1-based) open source?
DeepSeek Chat (R1-based) is an open-source / open-weight model released by DeepSeek. Claude 3.5 Sonnet is a proprietary model released by Anthropic.

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