Kimi K2.5 vs GLM-4.6
Moonshot AI Kimi K2.5 | Z.ai GLM-4.6 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | Z.ai |
| Release date | Jan 27 2026 | Sep 30 2025 |
| Access | Open Weight | Open Weight |
| Specifications | ||
Parameters | 1T | 355B |
Context window | 256k | 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. | 52% | — |
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. | 76.8%Best | 68% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 87.6% | — |
| Timeline | ||
| Release gap | GLM-4.6 shipped 119 days before Kimi K2.5 | |
Which is better: Kimi K2.5 or GLM-4.6?
Kimi K2.5 leads GLM-4.6 on 1 of the 1 benchmark they both report (SWE-Bench Verified). GLM-4.6 shipped 119 days before Kimi K2.5, so benchmark comparisons should account for the intervening progress.
Kimi K2.5 has 1T parameters, while GLM-4.6 has 355B. Context windows are 256k (Kimi K2.5) vs 200k (GLM-4.6).
On SWE-Bench Verified, Kimi K2.5 leads at 76.8% vs GLM-4.6 at 68%.
Frequently asked questions
Kimi K2.5 was released by Moonshot AI on Jan 27 2026.
GLM-4.6 was released by Z.ai on Sep 30 2025.
Kimi K2.5 leads on SWE-Bench Verified — Kimi K2.5 76.8% vs GLM-4.6 68%.
Kimi K2.5 has a 256k context window; GLM-4.6 has 200k.