Is o4-mini or gpt-5.1-codex-max cheaper?

o4-mini is cheaper on output tokens ($4.40 vs $9.00 per 1M).

Which has the larger context window, o4-mini or gpt-5.1-codex-max?

gpt-5.1-codex-max has the larger context window (400K tokens).

o4-mini vs gpt-5.1-codex-max

o4-mini is cheaper on output tokens, while gpt-5.1-codex-max offers a larger context window. Choose o4-mini or gpt-5.1-codex-max based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	o4-mini	gpt-5.1-codex-max
Provider	Jiekou.AI	Jiekou.AI
Input / 1M tokens	$1.10	$1.13
Output / 1M tokens	$4.40	$9.00
Context window	200K	400K
Parameters	—	—
Open weights	No	No
Released	Jan 2026	Jan 2026

o4-mini details →gpt-5.1-codex-max details →

FAQ

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