Reddit: Google pulls Gemini 3.1 Pro from Antigravity IDE, leaving devs on Flash

Adventurous-Week-399 · reddit · 2026-10-11

A Reddit user criticizes Google's decision to deprecate Gemini 3.1 Pro in Antigravity IDE.

DeepMind's newly announced Gemini 4 Argon is still locked behind the Fairwind trusted-tester program and enterprise tiers, so most developers can't use it yet.
With 3.1 Pro gone, the IDE defaults to Gemini 3.8 Flash. The author argues that bolting "High Thinking" onto a lightweight model doesn't grant pro-tier parametric depth: on real codebases with sprawling dependencies and messy abstractions, 3.8 Flash keeps delivering "draw the rest of the owl" output.
3.1 Pro is older and costly to serve, but it actually holds project context together and doesn't cut corners on the hardest 20% of an implementation.
The ask isn't to stop progress: keep 3.1 Pro behind a "Legacy" toggle, rate-limit it, throttle daily quotas if compute cost is the issue, but don't yank it from the toolchain. Broken boilerplate at 120 tokens/s is useless next to waiting five extra seconds for code that compiles.

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