Is GPT 5.1 Thinking or GPT-5.2-Codex cheaper?

GPT 5.1 Thinking is cheaper on output tokens ($10.00 vs $14.00 per 1M).

Which has the larger context window, GPT 5.1 Thinking or GPT-5.2-Codex?

Both models offer a similar context window.

GPT 5.1 Thinking vs GPT-5.2-Codex

GPT 5.1 Thinking is cheaper on output tokens. Choose GPT 5.1 Thinking or GPT-5.2-Codex based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT 5.1 Thinking	GPT-5.2-Codex
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$1.25	$1.75
Output / 1M tokens	$10.00	$14.00
Context window	400K	400K
Parameters	—	—
Open weights	No	No
Released	Nov 2025	Dec 2025

GPT 5.1 Thinking details →GPT-5.2-Codex details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.