Google once again has a model worth at least some consideration. Gemini 3.5 Flash is likely the best model out there at its particular speed point, as long as you don’t mind that it is a Gemini model. So for cases where speed kills, this can be a reasonable choice. Otherwise, I don’t see signs you would want to use it over Opus 4.7 or GPT-5.5.

Google also had some other offerings for I/O Day, which this post will also cover.

Introducing Google Gemini 3.5 ‘Flash’

Google introduced Gemini 3.5 Flash, which it seems is for now their universal model until 3.5 Pro comes along. It is live in the usual places. It is a hybrid, where it has the speed of Flash but the cost is at least halfway to models like Opus and GPT-5.5.

Gemini 3.5 Pro is confirmed for next month.

They are focused on 3.5 Flash as a daily driver for agentic tasks. It has the advantage of being faster and cheaper than Claude Opus 4.7 or GPT-5.5, if it can do the job. Not as cheap as previous Flash models, though, this is basically a hybrid:

As always [...]

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Outline:

(00:40) Introducing Google Gemini 3.5 'Flash'

(04:52) Other People's Benchmarks

(06:04) Reactions

(12:18) Google AI Search

(13:15) Google Daily Brief

(14:21) Google I/O Day

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First published:
May 22nd, 2026

Source:
https://www.lesswrong.com/posts/WMZpPxqWEkZBBcaxf/gemini-3-5-flash-looks-good-for-how-fast-it-is