GLM 5.3 Flash now available on AI Gateway

Vercel's AI Gateway now offers GLM 5.3 Flash from Z.ai, a multimodal model supporting text and vision input with a 1M token context window. The model supports function calling, structured output, and streaming, and can be used in coding agents like Claude Code, Codex, OpenCode, Cursor, and Pi via the setup command. AI Gateway provides a unified API with no markup on provider pricing and no platform fee on inference, including BYOK requests.

GLM 5.3 Flash from Z.ai https://vercel.com/ai-gateway/models/glm-5.3-flash 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 https://vercel.com/docs/ai-gateway/coding-agents , 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 https://vercel.com/ai-gateway/models/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 https://vercel.com/changelog/custom-reporting-ai-gateway , Zero Data Retention support https://vercel.com/blog/zdr-on-ai-gateway , budgets for API keys https://vercel.com/docs/ai-gateway/authentication-and-byok/api-keys , routing rules https://vercel.com/docs/ai-gateway/models-and-providers/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 https://vercel.com/docs/ai-gateway/authentication-and-byok/byok BYOK requests. View all language models https://vercel.com/ai-gateway/models?type=text on AI Gateway.