GLM 5.3 available on Baseten

GLM 5.3, Z.ai’s latest flagship model, is now available through Baseten Model APIs and Loops. It has a 1M-token context window and defaults to high reasoning. Set reasoning_effort to low, high, or max to control reasoning depth.

Send requests to zai-org/GLM-5.3 through Baseten’s OpenAI-compatible endpoint:

curl https://inference.baseten.co/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $BASETEN_API_KEY" \
  -d '{
    "model": "zai-org/GLM-5.3",
    "messages": [{"role": "user", "content": "What is large-scale asynchronous training?"}]
  }'

Or get started with Loops and fine-tune the model.

For more information, see our docs for Model APIs and Loops for fine-tuning.