Claude 3.5 Sonnet (upgraded) vs Grok 4
Anthropic Claude 3.5 Sonnet (upgraded) | SpaceXAI Grok 4 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Oct 22 2024 | Jul 9 2025 |
| Access | Proprietary | Proprietary |
| Benchmarks | ||
Coding SWE-Bench VerifiedReal 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. | 49% | — |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet (upgraded) shipped 260 days before Grok 4 | |
Which is better: Claude 3.5 Sonnet (upgraded) or Grok 4?
Claude 3.5 Sonnet (upgraded) and Grok 4 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3.5 Sonnet (upgraded) shipped 260 days before Grok 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.
Direct benchmark comparisons are unavailable — Claude 3.5 Sonnet (upgraded) and Grok 4 don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 3.5 Sonnet (upgraded) was released by Anthropic on Oct 22 2024.
Grok 4 was released by SpaceXAI on Jul 9 2025.
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