AI Briefing
KO

GPT 5.3 Codex Now Available on AI Gateway

·2026.02.24 22:00

Key point

GPT 5.3 Codex has launched on AI Gateway, delivering enhanced coding and reasoning performance.

Details

GPT 5.3 Codex has launched on AI Gateway. This model combines the coding capabilities of GPT-5.2-Codex with the reasoning depth of GPT-5.2, delivering 25% faster speed and higher token efficiency compared to before.

Optimized for long-running agentic work, it supports research, tool use, and multi-step execution, and can handle the entire software lifecycle from debugging to deployment, product documentation, and data analysis.

In particular, it can maintain context while revising instructions mid-task, and produces ready-to-use results even for ambiguous prompts in web development.

AI Gateway provides a unified API for model calls, ensuring high uptime through usage and cost tracking, retry, failover, and performance optimization features.

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