# Gemini 3.5 Flash beats Opus 4.8 on bluffbench

> Source: <https://bsky.app/profile/simonpcouch.com/post/3mmwroep6lc2y>
> Published: 2026-05-29 01:34:09+00:00

This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.

### Post

Simon P. Couch

simonpcouch.com

did:plc:bspwzx2ytje3gbvikujf2gl5

Re-ran this eval against Opus 4.8, Gemini 3.5 Flash, and GPT 5.5. Opus 4.8 is a modest improvement over the previously tested Opus models, but Gemini 3.5 Flash is the real stand-out!
simonpcouch.github.io/bluffbench/
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2026-05-28T19:41:06.976Z