GPT 5.3 Codex is now on AI Gateway

GPT 5.3 Codex is now available on AI Gateway, combining the coding strengths of GPT-5.2-Codex with the reasoning depth of GPT-5.2 in a single unified model.

• •The model is 25% faster and more token-efficient than its predecessors
• •Built for long-running agentic work covering research, tool use, and multi-step execution across the full software lifecycle
• •Supports mid-task steering without losing context, allowing dynamic adjustments during complex workflows
• •Better interprets underspecified prompts for web development, defaulting to more production-ready output
• •AI Gateway provides a unified API with observability, Bring Your Own Key support, intelligent provider routing, and automatic retries