Is Google: Gemini 3.5 Flash or OpenAI: GPT-5 Pro cheaper?

Google: Gemini 3.5 Flash is cheaper on output tokens ($9.00 vs $120.00 per 1M).

Which has the larger context window, Google: Gemini 3.5 Flash or OpenAI: GPT-5 Pro?

Google: Gemini 3.5 Flash has the larger context window (1M tokens).

Google: Gemini 3.5 Flash vs OpenAI: GPT-5 Pro

Google: Gemini 3.5 Flash is cheaper on output tokens, while Google: Gemini 3.5 Flash offers a larger context window. Choose Google: Gemini 3.5 Flash or OpenAI: GPT-5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Google: Gemini 3.5 Flash	OpenAI: GPT-5 Pro
Provider	Kilo Gateway	Kilo Gateway
Input / 1M tokens	$1.50	$15.00
Output / 1M tokens	$9.00	$120.00
Context window	1M	400K
Parameters	—	—
Open weights	No	No
Released	May 2026	Oct 2025

Google: Gemini 3.5 Flash details →OpenAI: GPT-5 Pro details →

FAQ

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