Claude 3 SonnetvsClaude Opus 4
Claude 3 Sonnet | Claude Opus 4 | |
|---|---|---|
| Benchmarks | ||
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 40.4% | 79.6% |
| BenchmarksPublished by one model only | ||
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 34% |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | — | 72.5% |
| Overview | ||
| Company | Anthropic | Anthropic |
| Release date | Mar 4 2024 | May 22 2025 |
| Access | Proprietary | Proprietary |
Frequently asked questions
Claude Opus 4 leads Claude 3 Sonnet on 1 of the 1 benchmark they both report (GPQA Diamond). Claude 3 Sonnet shipped 444 days before Claude Opus 4, 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.
On GPQA Diamond, Claude Opus 4 leads at 79.6% vs Claude 3 Sonnet at 40.4%.
Claude 3 Sonnet was released by Anthropic on Mar 4 2024.
Claude Opus 4 was released by Anthropic on May 22 2025.
Claude Opus 4 leads on GPQA Diamond — Claude 3 Sonnet 40.4% vs Claude Opus 4 79.6%.
Other comparisons
Claude 3 SonnetvsGPT-5.6-CyberClaude Opus 4vsGPT-5.6-CyberClaude 3 SonnetvsGemini 3.7 FlashClaude Opus 4vsGemini 3.7 FlashClaude 3 SonnetvsMuse GlimmerClaude Opus 4vsMuse GlimmerClaude 3 SonnetvsGrok 4.6Claude Opus 4vsGrok 4.6Claude 3 SonnetvsDeepSeek-V4-Pro-0813Claude Opus 4vsDeepSeek-V4-Pro-0813Claude 3 SonnetvsMistral Medium 3.5Claude Opus 4vsMistral Medium 3.5