# Claude Opus 4.6 vs GPT-4.5 Preview

As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Math, Science, and Long context.

Claude Opus 4.6: $10 per 1M blended tokens.

GPT-4.5 Preview: price per 1M tokens is unset in the catalog.

Claude Opus 4.6: closed weights.

GPT-4.5 Preview: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in General LLM at #4 against #79.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Reasoning at #2 against #121.
- Which to pick, Math: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Math at #11 against #38.
- Which to pick, Science: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Science at #32 against #92.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 4.6 leads GPT-4.5 Preview in Long context at #2 against #93.

As of Oct 15, 2026, Claude Opus 4.6 is near state of the art, rank #2 in Reasoning (since Oct 15, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 15, 2026, GPT-4.5 Preview is a former state-of-the-art holder in General LLM (since Oct 17, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).