GLM 5.1 API Pricing

GLM 5.1 pricing by provider

11 listings across 10 providers. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

What GLM 5.1 costs in practice

1,000 requests with 2,000 input and 500 output tokens each

100 long-document requests with 100,000 input and 2,000 output tokens each

GLM 5.1 features

• Function calling
• Parallel tool calls
• Structured output
• Reasoning
• Prompt caching

Use GLM 5.1 with LiteLLM

Call GLM 5.1 through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/chat/completions. LiteLLM tracks the cost of every request at these prices.

from litellm import completion

response = completion(
    model="zai/glm-5.1",
    messages=[{"role": "user", "content": "Hello!"}],
)

model_list:
  - model_name: glm-5.1
    litellm_params:
      model: zai/glm-5.1
      # credentials: see the provider's LiteLLM docs page

curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "glm-5.1",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

GLM 5.1 FAQ

More Z.ai models

• GLM 5.2 Fast Preview$2.254 / $7.889 per 1M tokens
• GLM 5 Turbo$1.20 / $4 per 1M tokens
• GLM 5.3$1.40 / $4.40 per 1M tokens
• GLM 5.3 Flash$0.15 / $0.50 per 1M tokens
• GLM 5.1 Nvfp4 Mtp$1.40 / $4.40 per 1M tokens
• GLM 5.2$1.40 / $4.40 per 1M tokens
• GLM 5 Code$1.20 / $5 per 1M tokens
• GLM 5$1 / $3.20 per 1M tokens