Claude 3.5 Sonnet (upgraded) vs Grok Code Fast 1
Anthropic Claude 3.5 Sonnet (upgraded) | SpaceXAI Grok Code Fast 1 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Oct 22 2024 | Aug 28 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 310 days before Grok Code Fast 1 | |
Which is better: Claude 3.5 Sonnet (upgraded) or Grok Code Fast 1?
Claude 3.5 Sonnet (upgraded) and Grok Code Fast 1 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 310 days before Grok Code Fast 1, 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 Code Fast 1 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 Code Fast 1 was released by SpaceXAI on Aug 28 2025.
Other comparisons
Claude 3.5 Sonnet (upgraded) vs GPT-5.6 SolGrok Code Fast 1 vs GPT-5.6 SolClaude 3.5 Sonnet (upgraded) vs Gemini OmniGrok Code Fast 1 vs Gemini OmniClaude 3.5 Sonnet (upgraded) vs Muse Spark 1.1Grok Code Fast 1 vs Muse Spark 1.1Claude 3.5 Sonnet (upgraded) vs DeepSeek-V4-ProGrok Code Fast 1 vs DeepSeek-V4-ProClaude 3.5 Sonnet (upgraded) vs Mistral Medium 3.5Grok Code Fast 1 vs Mistral Medium 3.5Claude 3.5 Sonnet (upgraded) vs Kimi K2.7 CodeGrok Code Fast 1 vs Kimi K2.7 Code