GLM 5.3 Flash from Z.ai is now available on AI Gateway.
GLM-5.3 Flash is a multimodal model that supports text and vision input, with a 1M token context window. It supports function calling, structured output, and streaming. To use GLM-5.3 Flash, set model
to zai/glm-5.3-flash
:
You can also pass images alongside text in a message. URLs and Base64 data URLs both work, and a request can include multiple images:
To use it in a coding agent, run vercel ai-gateway coding-agents setup
to connect agents like Claude Code, Codex, OpenCode, Cursor, Pi, and more, then select zai/glm-5.3-flash
inside the agent.
Try GLM-5.3 Flash in the model playground. AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting, Zero Data Retention support, budgets for API keys, routing rules, and more.
AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on Bring Your Own Key (BYOK) requests. View all language models on AI Gateway.