GLM 5.3 Fast
GLM 5.3 Fast for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.
Explore GLM 5.3 Fast for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses through the unified API. Supported interfaces and current availability are shown below.
- OpenAI-style Chat Completions
- Anthropic-style Messages
- OpenAI-style Responses
Model details
- Context window
- 1M tokens
- Max output
- 128K tokens
- Input
- Text
- Output
- Text
- Capabilities
- Streaming
- Interfaces
- OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses
Pricing
Prices use the units shown below. No gateway fees. Usage, size and model options may affect the total.
| Metric | Price |
|---|---|
| Per generation | Price not published |
Why teams pick it
- GLM 5.3 Fast for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.
API availability
Availability for this model has not yet been verified. You can compare its features and pricing; request examples will appear once availability is confirmed.
/v1/chat/completionsOpenAI-style Chat Completions · openai SDK or plain HTTP
Availability not yet verified
/v1/messagesAnthropic-style Messages · @anthropic-ai/sdk SDK or plain HTTP
Availability not yet verified
/v1/responsesOpenAI-style Responses · openai SDK or plain HTTP
Availability not yet verified
More from Z.ai
GLM-5.3A coding-first flagship with a million-token context.$0.77 in · $2.42 outGLM-5.2Long-horizon coding and agentic engineering, at a lower price.$1.4 / 1M input tokens · $4.4 / 1M output tokens · See all rates on the model pageCogView-4CogView-4 for OpenAI-style Image Generation, Image editing, OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.$0.01 / request
Questions about this model
- Is there a free tier for GLM 5.3 Fast?
- No. You add credit and pay GLM 5.3 Fast'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 5.3 Fast included in Token Plans?
- No. GLM 5.3 Fast is pay-as-you-go only; Token Plans cover the other text models in the catalog.
- Can I use GLM 5.3 Fast 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-5.3-fast. The same key works in Codex, opencode, Cline, and other agents.
- Does GLM 5.3 Fast support tool calling and vision?
- GLM 5.3 Fast supports streaming on Inferray. It does not take image input. It does not support tool calling.
- Is it the real GLM 5.3 Fast?
- Yes. A request for glm-5.3-fast is answered by GLM 5.3 Fast from Z.ai, billed at its published list price. Inferray never substitutes a different or smaller model.