# Claude Opus 4.8 vs GPT-5.5

As of Oct 15, 2026, Claude Opus 4.8 leads GPT-5.5 in 5 of 8 shared categories: General LLM, Reasoning, Science, Coding › Web dev, and Long context.

Claude Opus 4.8: $10 per 1M blended tokens.

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

Claude Opus 4.8: closed weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 4.8 leads GPT-5.5 in General LLM at #21 against #22.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 4.8 leads GPT-5.5 in Reasoning at #10 against #26.
- Which to pick, Science: As of Oct 15, 2026, Claude Opus 4.8 leads GPT-5.5 in Science at #27 against #30.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 4.8 leads GPT-5.5 in Coding › Web dev at #35 against #48.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 4.8 leads GPT-5.5 in Long context at #10 against #26.
- Which to pick, Vision: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.8 in Vision at #10 against #13.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.8 in Factuality at #5 against #24.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads Claude Opus 4.8 in Abstraction (ARC) at #7 against #12.

As of Oct 15, 2026, Claude Opus 4.8 is a former state-of-the-art holder in Coding › Web dev (since Jun 5, 2026; sources LMArena WebDev; 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).