GPT-5.6 Luna vs GLM-5.2
OpenAI GPT-5.6 Luna | Z.ai GLM-5.2 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | Z.ai |
| Release date | Jun 26 2026 | Jun 16 2026 |
| Access | Proprietary | Open Weight |
| Specifications | ||
Parameters | — | 744B |
Context window | — | 1M |
| 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. | — | 62.1% |
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%Best | 81% |
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. | — | 40.5% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 91.2% |
| Timeline | ||
| Release gap | GLM-5.2 shipped 10 days before GPT-5.6 Luna | |
Which is better: GPT-5.6 Luna or GLM-5.2?
GPT-5.6 Luna leads GLM-5.2 on 1 of the 1 benchmark they both report (Terminal-Bench 2.1). GLM-5.2 shipped 10 days before GPT-5.6 Luna, so benchmark comparisons should account for the intervening progress.
GPT-5.6 Luna is proprietary, while GLM-5.2 is open weight.
On Terminal-Bench 2.1, GPT-5.6 Luna leads at 82.5% vs GLM-5.2 at 81%.
Frequently asked questions
GPT-5.6 Luna was released by OpenAI on Jun 26 2026.
GLM-5.2 was released by Z.ai on Jun 16 2026.
GPT-5.6 Luna leads on Terminal-Bench 2.1 — GPT-5.6 Luna 82.5% vs GLM-5.2 81%.
GPT-5.6 Luna is a proprietary model released by OpenAI. GLM-5.2 is an open weight model released by Z.ai.
Other comparisons
GPT-5.6 Luna vs Claude Fable 5GLM-5.2 vs Claude Fable 5GPT-5.6 Luna vs Gemini OmniGLM-5.2 vs Gemini OmniGPT-5.6 Luna vs Muse SparkGLM-5.2 vs Muse SparkGPT-5.6 Luna vs Grok 4.3 BetaGLM-5.2 vs Grok 4.3 BetaGPT-5.6 Luna vs DeepSeek-V4-ProGLM-5.2 vs DeepSeek-V4-ProGPT-5.6 Luna vs Mistral Medium 3.5GLM-5.2 vs Mistral Medium 3.5