GLM 5.2

GLM-5.2 is Zhipu AI's (brand Z.AI) coding-focused flagship, launched June 13, 2026, a 744B-parameter mixture-of-experts model with about 40B active parameters per token. Its headline feature is a 1,000,000-token context window, a 5x jump over GLM-5.1, with maximum output around 131K tokens, suited to repo-scale diffs and long plan-then-execute traces. It ships with broad agent-tool compatibility (Claude Code, Cline, OpenClaw and others) and MIT-licensed open weights. Ideal for long-horizon coding and agentic engineering over very large codebases.

curl https://api.tunerouter.com/v1/chat/completions \
  -H "Authorization: Bearer $TUNEROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "glm-5.2", "messages": [{"role": "user", "content": "Hello!"}]}'

Model ID: glm-5.2 · works with OpenAI SDKs — just point base_url at api.tunerouter.com