Z.ai · 2026-04-07
GLM 5.1 pricing
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks.
Prices from OpenRouter’s models API, updated October 29, 2026
What GLM 5.1 costs a month
| Workload | Standard |
|---|---|
| Support chatbot: 1,000 chats a day, 1,500 tokens in, 400 out | $116 |
| Daily summaries: 10,000 a day, 3,000 tokens in, 300 out | $1,656 |
| Coding agent: 400 calls a day, 60,000 tokens in (80% cached), 2,000 out | $457 |
30 days. Cached input billed at the cache-read price. Use your own numbers.
Cheaper models with a similar context window
| Model | Provider | Input /1M | Output /1M | Cache read /1M | Context | Chatbot, per month* |
|---|---|---|---|---|---|---|
| GLM 5.3 Flash | Z.ai | $0.046 | $0.074 | $0.03 | 1.05M | $2.95 |
| Mercury 2.5 | inception | $0.04 | $0.15 | $0.004 | 260K | $3.60 |
| Granite 4.2 8B | ibm-granite | $0.06 | $0.15 | $0.015 | 131K | $4.50 |
| Solar Mini 4 | upstage | $0.05 | $0.20 | $0.005 | 524K | $4.65 |
| Ling 3.0 Flash VL | inclusionai | $0.06 | $0.18 | $0.012 | 131K | $4.86 |
* Support chatbot: 1,000 chats a day, 1,500 tokens in, 400 out, 30 days, no caching. Prices in US dollars per 1M tokens.
Cheaper isn’t automatically as good. Glow’s GlowBench scores models on your kind of task before suggesting a swap.
Other GLM models
| Model | Input /1M | Output /1M | Cache read /1M | Context | Chatbot, per month* |
|---|---|---|---|---|---|
| GLM 5.3 Prime | $2.80 | $8.80 | $0.56 | 1M | $232 |
| GLM 5.3 FlashX | $0.37 | $1.25 | $0.09 | 1.05M | $31.65 |
| GLM 5.3 Flash | $0.046 | $0.074 | $0.03 | 1.05M | $2.95 |
| GLM 5.3 | $0.07 | $1.40 | $0.069 | 1.05M | $19.95 |
| GLM 5.2 | $0.006 | $7 | $0.005 | 1.05M | $84.27 |
| GLM 5V Turbo | $1.20 | $4 | $0.24 | 203K | $102 |
* Support chatbot: 1,000 chats a day, 1,500 tokens in, 400 out, 30 days, no caching. Prices in US dollars per 1M tokens.
Related
GLM 5.1: questions
How much does GLM 5.1 cost?
$1.40 per 1M input tokens and $4.40 per 1M output tokens, with cached input at $0.26. A 1,000-token prompt with a 500-token answer costs about $0.0036.
What is GLM 5.1’s context window?
204,800 tokens, with up to 131,072 output tokens per response.
Is there a cheaper alternative to GLM 5.1?
GLM 5.3 Flash costs $0.046 in and $0.074 out per 1M tokens with a similar context window. Whether it matches GLM 5.1’s quality depends on the task: test it on your own prompts (Glow’s GlowBench does this per task).
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