GPT 5.1 Codex Max now available on Vercel AI Gateway

Published: 9 hours ago (December 5, 2025 at 08:00 AM EST)

1 min read

Source: Vercel Blog

GPT‑5.1 Codex Max Now Available on Vercel AI Gateway

Direct access: You can now use OpenAI’s latest Codex model, GPT‑5.1 Codex Max, through Vercel’s AI Gateway without needing any other provider accounts.
Performance improvements: GPT‑5.1 Codex Max is faster and more token‑efficient than previous Codex models.
Optimized for coding: The model is tuned for long‑running coding tasks, allowing it to maintain context and reasoning over extended sessions.

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GPT‑5.1 Codex Max Now Available on Vercel AI Gateway

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