GLM 5.2 API — unlimited & flat-rate access
GLM 5.2 is Zhipu AI’s (Z.ai) frontier open-source coding and reasoning model. CheapestInference serves it through an OpenAI- and Anthropic-compatible API on unlimited time-block subscriptions — so your cost does not scale with tokens.
Quick facts
Section titled “Quick facts”| Model | GLM 5.2 |
| Provider | Zhipu AI (Z.ai) |
| Model ID | glm-5.2 |
| Context window | 198K tokens |
| Cost basis | $1.40 / $4.40 per 1M tokens (in / out) |
| Endpoints | /v1/chat/completions (OpenAI), /anthropic/v1/messages (Anthropic) |
| Pricing | From $39/mo — reserve an 8-hour daily time block, up to full 24/7 |
Call GLM 5.2
Section titled “Call GLM 5.2”from openai import OpenAI
client = OpenAI( base_url="https://api.cheapestinference.com/v1", api_key="sk-..." # your subscriber key)
response = client.chat.completions.create( model="glm-5.2", messages=[{"role": "user", "content": "Write a unit test for..."}],)curl https://api.cheapestinference.com/v1/chat/completions \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{"model": "glm-5.2", "messages": [{"role": "user", "content": "Hello"}]}'GLM 5.2 is a reasoning model — it produces internal reasoning before its final answer. Set a generous max_tokens so the response is not truncated mid-reasoning.
Why flat-rate GLM 5.2
Section titled “Why flat-rate GLM 5.2”GLM 5.2 is a capable, frontier coding and reasoning model. On CheapestInference you pay a fixed monthly fee rather than per token, so heavy coding and agent workloads have a predictable cost. It is part of the frontier failover set alongside Kimi K2.6 and MiniMax M3, and works in any OpenAI-compatible client (Cline, Roo Code, Continue, and similar).
Common questions
Section titled “Common questions”Is there a GLM 5.2 API?
Yes. Use model id glm-5.2 against https://api.cheapestinference.com/v1. The API is OpenAI- and Anthropic-SDK compatible.
How much does GLM 5.2 cost? From $39/month. You reserve one or more 8-hour daily time blocks (up to full 24/7) and use GLM 5.2 with no usage cap — billed at a flat monthly fee, not per token.
Which provider is GLM 5.2 from? GLM 5.2 is made by Zhipu AI (Z.ai). CheapestInference serves it with automatic failover across direct providers.