GPT 5.1 Codex Max now available on Vercel AI Gateway

T1Covered by 1 source · first reported by Vercel (blog + changelog) at 05 Dec 2025, 13:00 UTC

AI Gateway You can now access OpenAI's latest Codex models, GPT-5.1 Codex Max with Vercel'sand no other provider accounts required. Using a process called compaction, GPT-5.1 Codex Max has been trained to operate across multiple context windows and on real-world software engineering tasks. GPT-5.1…