Claude 3 OpusvsGrok 4 Fast
Claude 3 Opus | Grok 4 Fast | |
|---|---|---|
| BenchmarksPublished by one model only | ||
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. | 33% | — |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 50.4% | — |
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Mar 4 2024 | Sep 19 2025 |
| Access | Proprietary | Proprietary |
Other comparisons
Claude 3 OpusvsGPT-6 AstraGrok 4 FastvsGPT-6 AstraClaude 3 OpusvsGemini 3.8 FlashGrok 4 FastvsGemini 3.8 FlashClaude 3 OpusvsMuse Spark 1.3Grok 4 FastvsMuse Spark 1.3Claude 3 OpusvsDeepSeek-V4.1-FlashGrok 4 FastvsDeepSeek-V4.1-FlashClaude 3 OpusvsMistral Medium 3.5Grok 4 FastvsMistral Medium 3.5Claude 3 OpusvsKimi K3Grok 4 FastvsKimi K3
Frequently asked questions
Claude 3 Opus and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3 Opus shipped 564 days before Grok 4 Fast, 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 — Claude 3 Opus and Grok 4 Fast don't publish scores on any of the same benchmarks.