Is Gemini 3.1 Flash Lite or GPT 5.5 Pro cheaper?

Gemini 3.1 Flash Lite is cheaper on output tokens ($1.50 vs $180.00 per 1M).

Which has the larger context window, Gemini 3.1 Flash Lite or GPT 5.5 Pro?

Both models offer a similar context window.

Gemini 3.1 Flash Lite vs GPT 5.5 Pro

Gemini 3.1 Flash Lite is cheaper on output tokens. Choose Gemini 3.1 Flash Lite or GPT 5.5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Gemini 3.1 Flash Lite	GPT 5.5 Pro
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$0.25	$30.00
Output / 1M tokens	$1.50	$180.00
Context window	1M	1M
Parameters	—	—
Open weights	No	No
Released	May 2026	Apr 2026

Gemini 3.1 Flash Lite details →GPT 5.5 Pro details →

FAQ

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