GPT-6 Sol and Luna compared side by side on the same prompt

A side-by-side test of Sol and Luna on the same prompt with no harness finds both clearly below Opus 5.5, though the author notes the large price gap.

Timothée Le Borgne

@Tim_LBArchived 2026.09.24Originally posted 2026.09.23

Timothée Le Borgne @Tim_LBOriginally posted 2026.09.23

Open original on X

And now... GPT6 Sol and GPT6 Luna, side-by-side. Exact same prompt, same conditions (no harness). Clearly (far) beneath Opus 5.5 BUT Consider the price! Sol6 : $0.70 Luna6: $0.04 Full spike here: https://ohmyunicorn.com/labs/dream-loop/planet-gpt6/

x.com/tim_lb/status/2102509273393627524Archived 2026.09.24 10:08

Open original on X