GLM 5.1 API Pricing
GLM 5.1 by Zhipu costs $1.40 per million input tokens and $4.40 per million output tokens.
Price verified from Zhipu's pricing page.
Rates and limits
- Input / 1M
- $1.40
- Output / 1M
- $4.40
- Cached input / 1M
- $0.26
- Batch discount
- None
- Context window
- 203K tokens
- Released
- April 2026
Pricing note: Z.ai international USD list price. Cached-input storage is free for a limited time.
What GLM 5.1 costs per month
Token volume split 3:1 between input and output, with no prompt caching.
| Tokens per month | Input / output | Standard |
|---|---|---|
| 1M | 750K / 250K | $2.15 |
| 10M | 7.5M / 2.5M | $21.50 |
| 100M | 75M / 25M | $215.00 |
Where to run GLM 5.1
Prices above are Zhipu's direct rates. Cloud platforms can charge differently; the cloud platform view compares them.
- Zhipu Open PlatformDirect API
- OpenRouterCloud / platform
GLM 5.1 pricing FAQ
How much does GLM 5.1 cost per million tokens?
GLM 5.1 costs $1.40 per million input tokens and $4.40 per million output tokens, as listed on Zhipu's pricing page on September 30, 2026.
How much does GLM 5.1 cost for 10 million tokens a month?
About $21.50 a month, assuming 7.5 million input and 2.5 million output tokens with no prompt caching.
What is the context window of GLM 5.1?
GLM 5.1 accepts up to 202,752 tokens of context.
Does GLM 5.1 support prompt caching?
Yes. Cached input tokens cost $0.26 per million, 81% less than the standard input rate.
Is there a batch discount for GLM 5.1?
No batch API price is listed for GLM 5.1.
Where can I use the GLM 5.1 API?
GLM 5.1 is available through Zhipu Open Platform and OpenRouter.
Compare with other models
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Prices shown as input / output per million tokens. All model prices · Side-by-side comparison