GLM-5.1 API

Model details

Context window

200K tokens

Max output

128K tokens

Input

Text

Output

Text

Capabilities

Reasoning, Tool calling, Streaming, JSON output

Interfaces

OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses

Why teams pick it

• GLM-5.1 for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.

Call GLM-5.1

GLM-5.1 answers on any of the APIs below — pick the one your code already speaks and just swap in your Inferray key.

curl https://api.inferray.com/v1/chat/completions \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "glm-5.1",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/messages \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "glm-5.1",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/responses \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "glm-5.1",
  "input": "Hello"
}'

Use GLM-5.1 in your tools

Every coding agent below has a setup guide. Set the model to glm-5.1.

• Claude Code
• Codex
• opencode
• Cline
• Roo Code
• Aider
• Continue

More from Z.ai

Alternatives to GLM-5.1

• Mistral Large 4Mistral Large 4 for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Mistral
• Claude Haiku 4.5Fast and efficient for high-volume, low-latency work.Anthropic
• GPT-6.1 TerraFast GPT-6.1 for visual reasoning, computer use, and writing.OpenAI

Questions about this model

How much does the GLM-5.1 API cost?

GLM-5.1 costs $1.4 per 1M input tokens and $4.4 per 1M output tokens on Inferray, and cached input is $0.26 per 1M. That is the list price, with no gateway fee on top.

Is there a free tier for GLM-5.1?

No. You add credit and pay GLM-5.1's list rate for each request — seats, projects, and API keys are free, and pay-as-you-go credit never expires.

Am I charged for failed requests?

No. A request that fails without returning a result is not billed. If a response fails part-way, the tokens already processed before the failure are charged.

Is GLM-5.1 included in Token Plans?

No. GLM-5.1 is pay-as-you-go only; Token Plans cover the other text models in the catalog.

Can I use GLM-5.1 in Claude Code?

Yes. Set ANTHROPIC_BASE_URL to https://api.inferray.com, ANTHROPIC_AUTH_TOKEN to your Inferray key, and ANTHROPIC_MODEL to glm-5.1. The same key works in Codex, opencode, Cline, and other agents.

Does GLM-5.1 support tool calling and vision?

GLM-5.1 supports tool calling, reasoning, JSON output and streaming on Inferray. It does not take image input.

Is it the real GLM-5.1?

Yes. A request for glm-5.1 is answered by GLM-5.1 from Z.ai, billed at its published list price. Inferray never substitutes a different or smaller model.