# Claude Opus 4.1 vs GPT-5.5

As of Oct 15, 2026, Claude Opus 4.1 leads GPT-5.5 in 0 of 6 shared categories.

Claude Opus 4.1: $29.999999999999996 per 1M blended tokens.

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

Claude Opus 4.1: closed weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.1 in General LLM at #22 against #73.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.1 in Reasoning at #26 against #60.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.1 in Science at #30 against #83.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.1 in Coding › Web dev at #48 against #84.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.1 in Long context at #26 against #52.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.1 in Factuality at #5 against #93.

As of Oct 15, 2026, Claude Opus 4.1 is a former state-of-the-art holder in General LLM (since Aug 18, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, GPT-5.5 is near state of the art, rank #5 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).