is now available on AI Gateway.GLM 5.3 from Z.ai GLM 5.3 has improvements vs. GLM 5.2 at complex software engineering and at agent tasks that run across many steps, and it reaches those results while producing fewer output tokens than GLM 5.2 did at the same effort level. Z.ai also reports stronger vulnerability discovery, including reasoning across the successive stages of an exploitation chain. measures that work directly, scoring how reliably a model finds security vulnerabilities in application code and what a run costs, and it covers GLM-5.3 at both high and max effort.DeepsecBench GLM 5.3 takes text input, with a 1M token context window and a maximum output of 128K tokens, both unchanged from GLM 5.2.

It supports function calling, structured output, streaming, and context caching. To use the model, the slug is :zai/glm-5.3 To use it in a , run to connect agents like Claude Code, Codex, OpenCode, Cursor, Pi, and more, then select inside the agent.coding agentvercel ai-gateway coding-agents setupzai/glm-5.3 AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider…