# GPT-5.4 Pro vs GPT-5.6 Sol

As of Oct 15, 2026, GPT-5.4 Pro leads GPT-5.6 Sol in 1 of 2 shared categories: Science.

GPT-5.4 Pro: $67.5 per 1M blended tokens.

GPT-5.6 Sol: $8.000000000000002 per 1M blended tokens.

GPT-5.4 Pro: closed weights.

GPT-5.6 Sol: closed weights.

- Which to pick, Science: As of Oct 15, 2026, GPT-5.4 Pro leads GPT-5.6 Sol in Science at #6 against #13.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.6 Sol leads GPT-5.4 Pro in Abstraction (ARC) at #3 against #8.

As of Oct 15, 2026, GPT-5.4 Pro is a former state-of-the-art holder in Math (since Apr 16, 2026; sources Humanity's Last Exam; methodology v1.0).

As of Oct 15, 2026, GPT-5.6 Sol is near state of the art, rank #3 in Vision (since Oct 15, 2026; sources GDP.pdf; methodology v1.0).