Z.ai GLM 5.3 Flash available, with a 1M-token context window

Z.ai GLM 5.3 Flash (zai-glm-5-3-flash) is now available. (model)
- A multimodal 320B-parameter (18B active) Mixture-of-Experts model from Z.ai with a 1M-token context window.
- Built for developer agent workflows, visual coding, and complex tool-use tasks.
- Pricing: $0.15/M input tokens, $0.03/M cached input, $0.50/M output tokens.