Model Library
Z AIReleased April 7, 2026GLM-5.1
Z AI · Released April 7, 2026
Intelligence score
40
At a glance
- Intelligence
- 40
- Speed
- 79.6tokens/sec
- Latency
- 1.46stime to first token
- Input price
- $1.40per 1M tokens
- Output price
- $4.40per 1M tokens
- Context window
- 200Ktokens
- Parameters
- 744billions
Summary
Comparison summary
GLM-5.1 (Reasoning) scores 40 on the Artificial Analysis Intelligence Index, placing it well above average among other open weight models of similar size (median: 25). GLM-5.1 (Reasoning) generates output at 79.6 tokens per second (based on the median across providers serving the model), which is above average compared to other open weight models of similar size (median: 61.7 t/s). GLM-5.1 (Reasoning) costs $1.40 per 1M input tokens (at the higher end, median: $0.59) and $4.40 per 1M output tokens (at the higher end, median: $2.20), based on the median across providers serving the model.
Specifications
Technical specifications
| Model name | GLM-5.1 |
|---|---|
| Provider | Z AI |
| Release date | April 7, 2026 |
| Intelligence score | 40 |
| Speed | 79.6 tokens/sec |
| Latency (TTFT) | 1.46s |
| Input price | $1.40 / 1M tokens |
| Output price | $4.40 / 1M tokens |
| Context window | 200,000 tokens |
| Parameters | 744B |
| Reasoning | Yes |
| Input modalities | text |
| Output modalities | — |
| Open weights | Yes |
| License | Mit |
| API availability | — |
| Source | Model Intelligence legacy profile: glm-5-1 |
Pricing
Token prices
Price per 1M tokens
GLM-5.1, as listed in the catalog record
- Input$1.40
- Output$4.40
| Token type | Price per 1M |
|---|---|
| Input | $1.40 |
| Output | $4.40 |
Model Intelligence legacy profile: glm-5-1
FAQ · 21
Frequently asked questions
GLM-5.1 (Reasoning) was released on April 7, 2026.
GLM-5.1 (Reasoning) was created by Z AI.
GLM-5.1 (Reasoning) scores 40 on the Artificial Analysis Intelligence Index, placing it well above average among other open weight models of similar size (median: 25).
GLM-5.1 (Reasoning) generates output at 79.6 tokens per second (based on the median across providers serving the model), which is above average compared to other open weight models of similar size (median: 61.7 t/s).
GLM-5.1 (Reasoning) has a time to first token (TTFT) of 1.46s (based on the median across providers serving the model), which is better than average compared to other open weight models of similar size (median: 2.01s).
GLM-5.1 (Reasoning) costs $1.40 per 1M input tokens (at the higher end, median: $0.59) and $4.40 per 1M output tokens (at the higher end, median: $2.20), based on the median across providers serving the model.
GLM-5.1 (Reasoning) costs $1.40 per 1M input tokens and $4.40 per 1M output tokens (based on the median across providers serving the model). For a blended rate (7:2:1 cache hit/input/output ratio), this is $0.90 per 1M tokens. Pricing may vary by provider.
When evaluated on the Intelligence Index, GLM-5.1 (Reasoning) generated 120M output tokens, which is somewhat higher than average compared to other open weight models of similar size (median: 92M).
Yes, GLM-5.1 (Reasoning) is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
GLM-5.1 (Reasoning) supports text input.
GLM-5.1 (Reasoning) supports text output.
No, GLM-5.1 (Reasoning) does not support image input. It can only process text.
No, GLM-5.1 (Reasoning) is not multimodal. It only supports text input.
GLM-5.1 (Reasoning) has a context window of 200k tokens. This determines how much text and conversation history the model can process in a single request.
Yes, GLM-5.1 (Reasoning) is open weights. The model weights are publicly available and can be downloaded for self-hosting.
GLM-5.1 (Reasoning) has 744 billion parameters (40 billion active).
GLM-5.1 (Reasoning) is a Mixture of Experts (MoE) model with 744 billion total parameters, but only 40 billion active parameters are used during inference.
GLM-5.1 (Reasoning) is released under the Mit license. This license allows commercial use.
GLM-5.1 (Reasoning) achieves a score of 40 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Yes, GLM-5.1 (Reasoning) is available via API through 12 providers.
GLM-5.1 (Reasoning) is available through 12 API providers.