# Claude Opus 4.5 vs GPT-6 Astra

As of Oct 14, 2026, Claude Opus 4.5 leads GPT-6 Astra in 1 of 8 shared categories: Long context.

Claude Opus 4.5: $10 per 1M blended tokens.

GPT-6 Astra: $20 per 1M blended tokens.

Claude Opus 4.5: closed weights.

GPT-6 Astra: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, GPT-6 Astra leads Claude Opus 4.5 in General LLM at #25 against #33.
- Which to pick, Reasoning: As of Oct 14, 2026, GPT-6 Astra leads Claude Opus 4.5 in Reasoning at #23 against #28.
- Which to pick, Math: As of Oct 14, 2026, GPT-6 Astra leads Claude Opus 4.5 in Math at #1 against #16.
- Which to pick, Science: As of Oct 14, 2026, GPT-6 Astra leads Claude Opus 4.5 in Science at #2 against #68.
- Which to pick, Coding › Web dev: As of Oct 14, 2026, GPT-6 Astra leads Claude Opus 4.5 in Coding › Web dev at #2 against #53.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 4.5 leads GPT-6 Astra in Long context at #19 against #22.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-6 Astra leads Claude Opus 4.5 in Factuality at #25 against #36.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, GPT-6 Astra leads Claude Opus 4.5 in Abstraction (ARC) at #1 against #49.

As of Oct 14, 2026, Claude Opus 4.5 is a former state-of-the-art holder in Reasoning (since Dec 1, 2025; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 14, 2026, GPT-6 Astra is state of the art in Math (since Sep 28, 2026; sources Humanity's Last Exam; methodology v1.0).