Name: Sonoma Sky Alpha
Author: OpenRouter

Sonoma Sky Alpha

OpenRouter · 2025-09-05

Sonoma Sky Alpha was a cloaked OpenRouter preview alias later identified as an early test version of Grok 4 Fast. Atlas keeps the alias as a benchmark entry because its pre-release behavior is not interchangeable with the released model.

Benchmark scores

Benchmark	Score
Ruby LLM Benchmarks — Program Fixer	64.4
Ruby LLM Program Fixer — Calendar	71.6
Ruby LLM Program Fixer — Parking Garage	39.3
Ruby LLM Program Fixer — School Library	71.3
Ruby LLM Program Fixer — Vending Machine	75.4