Claude Sonnet 5 vs Grok 4.5
Anthropic Claude Sonnet 5 | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | SpaceXAI |
| Release date | Jun 30 2026 | Jul 8 2026 |
| Access | Proprietary | Proprietary |
| Benchmarks | ||
Agentic coding SWE-Bench ProCan the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | 63.2% | 64.7%Best |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | — | 78% |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 61.2% | — |
Agentic coding DeepSWE 1.0Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. Higher is better. | — | 62% |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 80.4% | 83.3%Best |
Multidisciplinary reasoning Humanity's Last Exam · no toolsHumanity's Last Exam — extremely hard expert questions across many subjects, written so you can't just look up the answer. “No tools” means the AI answers on its own. Higher is better. | 43.2% | — |
Multidisciplinary reasoning Humanity's Last Exam · with toolsHumanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. | 57.4% | — |
Agentic computer use OSWorld-VerifiedCan the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 81.2% | — |
Knowledge work GDPval-AAMeasures how well the AI does economically valuable knowledge work, judged against human experts. Shown as a rating (like a chess Elo) — higher is better. | 1618 | — |
| Timeline | ||
| Release gap | Claude Sonnet 5 shipped 8 days before Grok 4.5 | |
Which is better: Claude Sonnet 5 or Grok 4.5?
Grok 4.5 leads Claude Sonnet 5 on 2 of the 2 benchmarks they both report (SWE-Bench Pro, Terminal-Bench 2.1). Claude Sonnet 5 shipped 8 days before Grok 4.5, 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 SWE-Bench Pro, Grok 4.5 leads at 64.7% vs Claude Sonnet 5 at 63.2%. On Terminal-Bench 2.1, Grok 4.5 leads at 83.3% vs Claude Sonnet 5 at 80.4%.
Frequently asked questions
Claude Sonnet 5 was released by Anthropic on Jun 30 2026.
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
Grok 4.5 leads on SWE-Bench Pro — Claude Sonnet 5 63.2% vs Grok 4.5 64.7%.
Other comparisons
Claude Sonnet 5 vs GPT-5.6 SolGrok 4.5 vs GPT-5.6 SolClaude Sonnet 5 vs Gemini OmniGrok 4.5 vs Gemini OmniClaude Sonnet 5 vs Muse SparkGrok 4.5 vs Muse SparkClaude Sonnet 5 vs DeepSeek-V4-ProGrok 4.5 vs DeepSeek-V4-ProClaude Sonnet 5 vs Mistral Medium 3.5Grok 4.5 vs Mistral Medium 3.5Claude Sonnet 5 vs Kimi K2.7 CodeGrok 4.5 vs Kimi K2.7 Code