# Claude Opus 5.5 vs GPT-5.4

As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in 6 of 7 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, Factuality, and Abstraction (ARC).

Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.

GPT-5.4: $5.625 per 1M blended tokens.

Claude Opus 5.5: closed weights.

GPT-5.4: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in General LLM at #2 against #30.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Reasoning at #1 against #32.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.4 leads Claude Opus 5.5 in Science at #16 against #31.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Coding › Web dev at #1 against #60.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Long context at #1 against #40.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Factuality at #1 against #6.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5.5 leads GPT-5.4 in Abstraction (ARC) at #1 against #10.

As of Oct 15, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 15, 2026, GPT-5.4 is a former state-of-the-art holder in General LLM (since Apr 10, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).