# Claude Fable 5.1 vs GPT-6 Astra

As of Oct 15, 2026, Claude Fable 5.1 leads GPT-6 Astra in 4 of 10 shared categories: General LLM, Reasoning, Long context, and Factuality.

Claude Fable 5.1: $20 per 1M blended tokens.

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

Claude Fable 5.1: closed weights.

GPT-6 Astra: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-6 Astra in General LLM at #6 against #26.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-6 Astra in Reasoning at #5 against #24.
- Which to pick, Math: As of Oct 15, 2026, GPT-6 Astra leads Claude Fable 5.1 in Math at #1 against #2.
- Which to pick, Coding: As of Oct 15, 2026, GPT-6 Astra leads Claude Fable 5.1 in Coding at #2 against #3.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, GPT-6 Astra leads Claude Fable 5.1 in Coding › Agentic at #2 against #3.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GPT-6 Astra leads Claude Fable 5.1 in Coding › Web dev at #2 against #5.
- Which to pick, Long context: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-6 Astra in Long context at #6 against #25.
- Which to pick, Vision: As of Oct 15, 2026, GPT-6 Astra leads Claude Fable 5.1 in Vision at #1 against #6.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Fable 5.1 leads GPT-6 Astra in Factuality at #1 against #29.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-6 Astra leads Claude Fable 5.1 in Abstraction (ARC) at #1 against #3.

As of Oct 15, 2026, Claude Fable 5.1 is tied for state of the art in Factuality (since Oct 2, 2026; sources LMArena Text factuality; 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).