GLM-5.1
GLM-5.1 — Z.ai (Zhipu) text model with an Intelligence Index of 35, a 256K-token context window and a blended price of $0.66/1M tokens (open weights).
Key specifications
| Intelligence Index | 35 |
|---|---|
| Coding Index | 55.8 |
| Agentic Index | 29.9 |
| Arena Elo | 973 |
| Context window (K tokens) | 256 |
| Blended price ($/1M tokens) | 0.7 |
| Output speed (tokens/s) | 59 |
About GLM-5.1
The GLM-5.1 is a text only model from Z.ai (Zhipu) with an Intelligence Index of 35.0, a Coding Index of 55.8 and a 256K-token context window. It runs at a blended price of $0.66 per million tokens and generates about 59 tokens/s. It is open weights, so it can also be self-hosted. Leaderboard indices are a strong signal but only part of real-world quality, which also depends on tool use, latency and task fit.
The comparisons below show how GLM-5.1 stacks up against the alternatives people most often weigh against it, with the specific numbers laid out side by side.
Frequently asked questions
Is the GLM-5.1 any good?
GLM-5.1 — Z.ai (Zhipu) text model with an Intelligence Index of 35, a 256K-token context window and a blended price of $0.66/1M tokens (open weights).
What are the key specs of the GLM-5.1?
See the specification table above for the full breakdown.