# Claude Sonnet 4.5 20250929 vs GPT-6 Astra

As of Oct 14, 2026, Claude Sonnet 4.5 20250929 leads GPT-6 Astra in 0 of 2 shared categories.

Claude Sonnet 4.5 20250929: price per 1M tokens is unset in the catalog.

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

Claude Sonnet 4.5 20250929: closed weights.

GPT-6 Astra: closed weights.

- Which to pick, Science: As of Oct 14, 2026, GPT-6 Astra leads Claude Sonnet 4.5 20250929 in Science at #2 against #66.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, GPT-6 Astra leads Claude Sonnet 4.5 20250929 in Abstraction (ARC) at #1 against #36.

As of Oct 14, 2026, Claude Sonnet 4.5 20250929 is ranked #36 in Abstraction (ARC) (since Oct 14, 2026; sources ARC-AGI; 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).