GPT-5.6 Luna vs Grok 4.5
OpenAI GPT-5.6 Luna | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | SpaceXAI |
| Release date | Jun 26 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. | — | 64.7% |
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 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. | 82.5% | 83.3%Best |
| Timeline | ||
| Release gap | GPT-5.6 Luna shipped 12 days before Grok 4.5 | |
Which is better: GPT-5.6 Luna or Grok 4.5?
Grok 4.5 leads GPT-5.6 Luna on 1 of the 1 benchmark they both report (Terminal-Bench 2.1). GPT-5.6 Luna shipped 12 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 Terminal-Bench 2.1, Grok 4.5 leads at 83.3% vs GPT-5.6 Luna at 82.5%.
Frequently asked questions
GPT-5.6 Luna was released by OpenAI on Jun 26 2026.
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
Grok 4.5 leads on Terminal-Bench 2.1 — GPT-5.6 Luna 82.5% vs Grok 4.5 83.3%.
Other comparisons
GPT-5.6 Luna vs Claude Sonnet 5Grok 4.5 vs Claude Sonnet 5GPT-5.6 Luna vs Gemini OmniGrok 4.5 vs Gemini OmniGPT-5.6 Luna vs Muse SparkGrok 4.5 vs Muse SparkGPT-5.6 Luna vs DeepSeek-V4-ProGrok 4.5 vs DeepSeek-V4-ProGPT-5.6 Luna vs Mistral Medium 3.5Grok 4.5 vs Mistral Medium 3.5GPT-5.6 Luna vs Kimi K2.7 CodeGrok 4.5 vs Kimi K2.7 Code