GLM-5.2 OpenAI-Compatible API: A Hands-On Guide to Reasoning Effort, Function Calling, and Long-Context Retrieval
GLM-5.2 just shipped an OpenAI-compatible API. Here's what reasoning effort, function calling, and long-context actually do in production.
Why it matters
GLM-5.2's OpenAI-compatible API enables developers to swap models without rewriting infrastructure. The hands-on walkthrough of reasoning effort, function calling, and long-context retrieval shows how interoperability is becoming table stakes in the AI stack.
The key facts
11 to knowGLM-5.2 offers OpenAI-compatible API
Supports thinking-effort control and streamed reasoning
Function calling and tool-using agent capabilities
Structured JSON output support
Long-context retrieval functionality
Token and cost accounting built-in
Hosted API model (not local deployment)
GLM-5.2 offers OpenAI-compatible API endpoint
Supports thinking-effort control (reasoning configuration)
Includes streamed reasoning output
Token and cost accounting included in demos
Go to the source
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Publisher excerpt: We build a practical GLM-5.2 workflow using its hosted, OpenAI-compatible API instead of running the model locally. We set up multiple providers, load the API key securely, and create a reusable chat wrapper. We then test thinking-effort control, streamed reasoning, function calling, a tool-using…