Is Google Gemini 2.5 Flash or OpenAI GPT-4o cheaper?

Google Gemini 2.5 Flash is cheaper on output tokens ($2.50 vs $10.00 per 1M).

Which has the larger context window, Google Gemini 2.5 Flash or OpenAI GPT-4o?

Google Gemini 2.5 Flash has the larger context window (1M tokens).

Google Gemini 2.5 Flash vs OpenAI GPT-4o

Google Gemini 2.5 Flash is cheaper on output tokens, while Google Gemini 2.5 Flash offers a larger context window. Choose Google Gemini 2.5 Flash or OpenAI GPT-4o based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Google Gemini 2.5 Flash	OpenAI GPT-4o
Provider	Helicone	Helicone
Input / 1M tokens	$0.30	$2.50
Output / 1M tokens	$2.50	$10.00
Context window	1M	128K
Parameters	—	—
Open weights	No	No
Released	Jun 2025	May 2024

Google Gemini 2.5 Flash details →OpenAI GPT-4o details →

FAQ

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