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Claude 3 Sonnet vs Grok 3

1 vs 0 benchmarks won

Anthropic
Claude 3 Sonnet
xAI
Grok 3
Overview
CompanyAnthropicxAI
Release dateMar 4 2024Feb 17 2025
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
40.4%
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapClaude 3 Sonnet shipped 350 days before Grok 3

Which is better: Claude 3 Sonnet or Grok 3?

Claude 3 Sonnet leads Grok 3 on 1 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude 3 Sonnet shipped 350 days before Grok 3, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

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 Sonnet released?
Claude 3 Sonnet was released by Anthropic on Mar 4 2024.
When was Grok 3 released?
Grok 3 was released by xAI on Feb 17 2025.

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