Kimi K2 vs GLM-5.1
Moonshot AI Kimi K2 | Z.ai GLM-5.1 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | Z.ai |
| Release date | Jul 11 2025 | Apr 7 2026 |
| Access | Open Weight | Open Weight |
| Specifications | ||
Parameters | 1T | 744B |
Context window | 128k | 200k |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 10% | — |
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. | 65.8% | — |
Agentic terminal coding Terminal-Bench 2.0Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. | — | 63.5% |
Web browsing BrowseCompCan the AI browse the web and track down hard-to-find answers? Higher is better. | — | 68% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 75.1% | 86.2%Best |
| Timeline | ||
| Release gap | Kimi K2 shipped 270 days before GLM-5.1 | |
Which is better: Kimi K2 or GLM-5.1?
GLM-5.1 leads Kimi K2 on 1 of the 1 benchmark they both report (GPQA Diamond). Kimi K2 shipped 270 days before GLM-5.1, so benchmark comparisons should account for the intervening progress.
Kimi K2 has 1T parameters, while GLM-5.1 has 744B. Context windows are 128k (Kimi K2) vs 200k (GLM-5.1).
On GPQA Diamond, GLM-5.1 leads at 86.2% vs Kimi K2 at 75.1%.
Frequently asked questions
Kimi K2 was released by Moonshot AI on Jul 11 2025.
GLM-5.1 was released by Z.ai on Apr 7 2026.
GLM-5.1 leads on GPQA Diamond — Kimi K2 75.1% vs GLM-5.1 86.2%.
Kimi K2 has a 128k context window; GLM-5.1 has 200k.