Hands-on: Gemini 4 Argon is sharp in Antigravity but hallucinates badly

A user reports Gemini 4 Argon writes well and catches bugs other frontier models miss, but hallucinates wildly in Antigravity and doubles down on its errors.

Stephan Hoyer

@shoyerArchived 16 days agoOriginally posted 2026.10.20

Hands-on: Gemini 4 Argon is sharp in Antigravity but hallucinates badly (image 1 of 2)

Hands-on: Gemini 4 Argon is sharp in Antigravity but hallucinates badly (image 2 of 2)

Stephan Hoyer @shoyerOriginally posted 2026.10.20

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Gemini 4 Argon is really smart and an excellent writer, but also hallucinates wildly (at least in @antigravity), and double downs on its lie! I really want to be using Argon (it caught bugs that no other frontier model noticed), but this product experience is awful.

x.com/shoyer/status/2112234151017681398Archived 2026.10.20 09:58

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