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GLM 5.1: price, performance and context
Open GLM 5.1 by Z.ai costs $0.966 per 1M input and $3.036 per 1M output tokens, handles up to 204.8K tokens in one request (≈ 610 pages of text) and scores 26.1 points on the AgentKernel performance index, rank 60 of 212.
Privacy: zero data retention with 6 providers, not in the EU. Availability over the last 24 h: 100%.
Open in the interactive comparisonKey facts
- Licence
- Open weights: free to download and self-host
- Input / 1M tokens
- $0.966
- Output / 1M tokens
- $3.036
- Context window
- 204.8K tokens
- Max. output
- 128K tokens
- Performance index
- 26.1 points · rank 60 of 212
- Coding index
- 55.8 points · rank 45 of 119
- Agentic index
- 23.9 points · rank 36 of 91
- Cost at your usage
- $1.725 / month
- Knowledge cutoff
- n/a
- In the catalog since
- Apr 07, 2026
- Capabilities
- Reasoning, Tool Calling
Placements by task
What do you get for $10.00?
Rules of thumb from the cost calculator, base rates without caching or taxes.
| Task | Cost per task | For $10.00 |
|---|---|---|
| Chat repliesA question with a short history, a detailed answer | $0.002 | 5,500 |
| Email draftsBullet points in, a finished email out | $0.001 | 6,900 |
| Document summariesRead 10 pages, write a one-page summary | $0.005 | 2,100 |
| Code reviewsReview and comment on 500 lines of code | $0.008 | 1,200 |
| Book analysesAnalyse a 300-page book in one go | $0.103 | 97 |
Cheaper with similar performance
| Model | Licence | Performance | Your cost / month |
|---|---|---|---|
| Ling 3.1 FlashinclusionAI | Proprietary | 41.1 | $0.00 |
| Ling 3.0 Flash VLinclusionAI | Open | 24.6 | $0.036 |
| Ling 3.0 Flash FininclusionAI | Proprietary | 22.6 | $0.073 |
Stronger models
| Model | Licence | Performance | Your cost / month |
|---|---|---|---|
| Gemini 3 Flash PreviewGoogle | Proprietary | 26.3 | $1.25 |
| GLM 5 TurboZ.ai | Proprietary | 26.6 | $2.20 |
| Kimi K2.6Moonshot AI | Open | 27 | $1.047 |