GPT 5.3 Codex is now on AI Gateway
Vercel's AI Gateway now surfaces a new reasoning+coding hybrid model optimized for agentic software development work. For founders building AI-native dev tools, this is a capability milestone that changes what's possible in code generation and multi-step task execution.
Why it ranks · · GPT-5.3 Codex combines GPT-5.2-Codex coding strengths with GPT-5.2 reasoning depth · 2026-02-24
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