# Claude Sonnet 4.5 vs GPT-6 Astra

As of Oct 15, 2026, Claude Sonnet 4.5 leads GPT-6 Astra in 0 of 8 shared categories.

Claude Sonnet 4.5: $6 per 1M blended tokens.

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

Claude Sonnet 4.5: closed weights.

GPT-6 Astra: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in General LLM at #26 against #62.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in Reasoning at #24 against #51.
- Which to pick, Math: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in Math at #1 against #25.
- Which to pick, Science: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in Science at #2 against #82.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in Coding › Web dev at #2 against #86.
- Which to pick, Long context: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in Long context at #25 against #34.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in Factuality at #29 against #61.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 4.5 in Abstraction (ARC) at #1 against #66.

As of Oct 15, 2026, Claude Sonnet 4.5 is a former state-of-the-art holder in General LLM (since Oct 3, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, GPT-6 Astra is state of the art in Math (since Sep 28, 2026; sources Humanity's Last Exam; methodology v1.0).