# Z.ai GLM 5.3 Flash

Z.AI's GLM 5.3 Flash is a multimodal 320B-parameter (18B active) Mixture-of-Experts model. Built for developer agent workflows, visual coding, and complex tool-use tasks. The model is served without Mistral modifications.

- API names: `zai-glm-5-3-flash`
- Status: GA
- Type: Open, Generalist
- Release date: 2026-10-22
- Version: 5.3-flash
- Context length: 1M
- Output token limit: 128k
- Input: text, image
- Output: reasoning, text
- Features: structured-outputs, function-calling, document-qna, prefix, chat-completions, batching, agents-conversations, connectors
- Speed rating: 5/5
- Performance rating: 5/5
- Pricing: Input $0.15 /M Tokens; Cached input $0.03 /M Tokens; Output $0.5 /M Tokens