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My notes on Gemini 3.5 Flash - 3x the price of Gemini 3 Flash but Google are planning to use it for many of their own products simonwillison.net/2026/May/19/...

simonwillison.netGemini 3.5 Flash: more expensive, but Google plan to use it for everythingToday at Google I/O, Google released Gemini 3.5 Flash. This one skipped the -preview modifier and went straight to general availability, and Google appear to be using it for a …

Shawn Simister

@narphorium.com

So 3.5 flash is more expensive than Opus 4.7 high? I thought the flash models were supposed to be the mid range like sonnet?

20/5/26, 12:35 am0 reposts0 likes

Simon Willison

@simonwillison.net

20 May

It's cheaper per-token but more expensive to run the full Artificial Analysis benchmark Here are comparative per-token prices: www.llm-prices.com#sel=gemini-3...

Shawn Simister

@narphorium.com

20 May

So the tokens are cheaper but it takes more thinking tokens to get the same result on the benchmark so the cost to run the benchmark is higher?

Shawn Simister

@narphorium.com

20 May

Ok, yeah looking at the AA results. Gemini 3.5 Flash high took 73M tokens to get a score of 55, Opus 4.7 high took 12M tokens to get a score of 52 and Opus 4.7 max took 110M tokens to get a score of 57