Model comparison · updated 2026-07-28

GPT-5.5 ProvsGemini 3.5 Flash

Side-by-side pricing for1 million tokens

Price comparison

GPT-5.5 ProGemini 3.5 FlashVerdict
ProviderOpenAIGoogle--
Context window400K1M--
Input / 1M tokens$30$1.50Gemini 3.5 Flash is 20x cheaper
Output / 1M tokens$180$9Gemini 3.5 Flash is 20x cheaper
Output:input ratio6x6x--
Tierfrontierbalanced--

What does $10 buy?

$10 of input

GPT-5.5 Pro

333,333 tokens

Gemini 3.5 Flash

6,666,667 tokens

Gemini 3.5 Flash gives you 20x more input for the same budget.

$10 of output

GPT-5.5 Pro

55,556 tokens

Gemini 3.5 Flash

1,111,111 tokens

Gemini 3.5 Flash gives you 20x more output for the same budget.

Individual model pages

Other comparisons