# Claude Sonnet 4.6 vs GPT-5.5

As of Oct 15, 2026, Claude Sonnet 4.6 leads GPT-5.5 in 3 of 8 shared categories: Reasoning, Coding › Web dev, and Long context.

Claude Sonnet 4.6: $6 per 1M blended tokens.

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

Claude Sonnet 4.6: closed weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads Claude Sonnet 4.6 in General LLM at #22 against #38.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 4.6 leads GPT-5.5 in Reasoning at #20 against #26.
- Which to pick, Science: As of Oct 15, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Science at #30 against #50.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 4.6 leads GPT-5.5 in Coding › Web dev at #43 against #48.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 4.6 leads GPT-5.5 in Long context at #21 against #26.
- Which to pick, Vision: As of Oct 15, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Vision at #10 against #23.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Factuality at #5 against #38.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads Claude Sonnet 4.6 in Abstraction (ARC) at #7 against #23.

As of Oct 15, 2026, Claude Sonnet 4.6 is a former state-of-the-art holder in Long context (since Mar 19, 2026; sources LMArena Text (style-controlled, longer query); 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).