GLM-5.2 API: Reasoning, Function Calling, Long Context

GLM-5.2 offers an OpenAI-compatible API supporting reasoning-effort control, streaming, function calling, structured JSON output, and long-context retrieval. The tutorial demonstrates building a reusable chat wrapper, a tool-using agent, and cost estimation. Pricing is $1.40 per million input tokens and $4.40 per million output tokens.