Z.ai: GLM 5.1
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...
Everything else
| Max output | 128K |
|---|---|
| Input / 1M | $0.966 |
| Output / 1M | $3.04 |
| Cache read / 1M | $0.179 |
| Cache write / 1M | — |
| 1M in + 1M out | $4 |
| Takes | text |
| Returns | text |
| Tools | yes |
| Reasoning | optional |
| Open weights | yes |
| Released | 2026-04-07 |
| Knowledge cutoff | — |
| Retires | — |
| Catalog id | z-ai/glm-5.1 |
Benchmarks
| source | epoch |
|---|---|
| eci | 150.43 |
| confidence | Confident |
| gpqa | 0.855 |
| gpqaStderr | 0.0207 |
| sweBenchVerified | 0.742 |
| sweBenchVerifiedStderr | 0.0199 |
| frontierMath | 0.334 |
| frontierMathStderr | 0.0278 |
| aime | 0.922 |
| aimeStderr | 0.0354 |
| simpleQA | 0.373 |
| simpleQAStderr | 0.0153 |
Benchmark scores by Epoch AI, CC BY 4.0.
Using it
In 00, this model is picked per agent — and per tier, so the model that answers your customers need not be the one that writes your code. Get 00.