# GPT-6 Sol is like GPT-5.6 Terra, GPT-6 Luna is like GPT-5.6 Asteroid

> Source: <https://twitter.com/i/status/2103026209361719406>
> Published: 2026-09-24 18:53:09+00:00

Situation today:
GPT-6 Sol is like GPT-5.6 Terra
GPT-6 Luna is like GPT-5.6 Asteroid

I finally tested GPT-6 Sol on a real work. 2 repos. 105 hidden bugs. Find and fixed what you can.
It looks like a huge degradation. The results:
- GPT-6 Astra (max): 45
- GPT-5.6 Sol (max): 43.5
- Opus 5.5 (max): 41.7
- Muse Spark 1.3 (max): 32.2
- GPT-6 Sol (max): 29.3
Until