# GPT-5.5 vs GPT-6.1 Sol

As of Oct 14, 2026, GPT-5.5 leads GPT-6.1 Sol in 1 of 8 shared categories: Factuality.

GPT-5.5: $11.25 per 1M blended tokens.

GPT-6.1 Sol: $4.000000000000001 per 1M blended tokens.

GPT-5.5: closed weights.

GPT-6.1 Sol: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, GPT-6.1 Sol leads GPT-5.5 in General LLM at #18 against #21.
- Which to pick, Reasoning: As of Oct 14, 2026, GPT-6.1 Sol leads GPT-5.5 in Reasoning at #15 against #25.
- Which to pick, Science: As of Oct 14, 2026, GPT-6.1 Sol leads GPT-5.5 in Science at #4 against #30.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, GPT-6.1 Sol leads GPT-5.5 in Coding › Web dev at #4 against #44.
- Which to pick, Long context: As of Oct 14, 2026, GPT-6.1 Sol leads GPT-5.5 in Long context at #17 against #23.
- Which to pick, Vision: As of Oct 14, 2026, GPT-6.1 Sol leads GPT-5.5 in Vision at #1 against #10.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-5.5 leads GPT-6.1 Sol in Factuality at #5 against #29.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, GPT-6.1 Sol leads GPT-5.5 in Abstraction (ARC) at #1 against #7.

As of Oct 14, 2026, GPT-5.5 is a former state-of-the-art holder in General LLM (since Apr 28, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 14, 2026, GPT-6.1 Sol is tied for state of the art in Vision (since Sep 30, 2026; sources GDP.pdf; methodology v1.0).