Is Gemini-2.5-Flash or GPT-5.1-Codex-Max cheaper?

Gemini-2.5-Flash is cheaper on output tokens ($1.80 vs $9.00 per 1M).

Which has the larger context window, Gemini-2.5-Flash or GPT-5.1-Codex-Max?

Gemini-2.5-Flash has the larger context window (1.1M tokens).

Gemini-2.5-Flash vs GPT-5.1-Codex-Max

Gemini-2.5-Flash is cheaper on output tokens, while Gemini-2.5-Flash offers a larger context window. Choose Gemini-2.5-Flash or GPT-5.1-Codex-Max based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Gemini-2.5-Flash	GPT-5.1-Codex-Max
Provider	Poe	Poe
Input / 1M tokens	$0.21	$1.10
Output / 1M tokens	$1.80	$9.00
Context window	1.1M	400K
Parameters	—	—
Open weights	No	No
Released	Apr 2025	Dec 2025

Gemini-2.5-Flash 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.