# GPT-5.6 Sol vs GPT-6 Astra

As of Oct 15, 2026, GPT-5.6 Sol leads GPT-6 Astra in 4 of 10 shared categories: General LLM, Reasoning, Long context, and Factuality.

GPT-5.6 Sol: $8.000000000000002 per 1M blended tokens.

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

GPT-5.6 Sol: closed weights.

GPT-6 Astra: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.6 Sol leads GPT-6 Astra in General LLM at #17 against #26.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.6 Sol leads GPT-6 Astra in Reasoning at #12 against #24.
- Which to pick, Science: As of Oct 15, 2026, GPT-6 Astra leads GPT-5.6 Sol in Science at #2 against #13.
- Which to pick, Coding: As of Oct 15, 2026, GPT-6 Astra leads GPT-5.6 Sol in Coding at #2 against #9.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, GPT-6 Astra leads GPT-5.6 Sol in Coding › Agentic at #2 against #9.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GPT-6 Astra leads GPT-5.6 Sol in Coding › Web dev at #2 against #23.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.6 Sol leads GPT-6 Astra in Long context at #13 against #25.
- Which to pick, Vision: As of Oct 15, 2026, GPT-6 Astra leads GPT-5.6 Sol in Vision at #1 against #3.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.6 Sol leads GPT-6 Astra in Factuality at #15 against #29.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-6 Astra leads GPT-5.6 Sol in Abstraction (ARC) at #1 against #3.

As of Oct 15, 2026, GPT-5.6 Sol is near state of the art, rank #3 in Vision (since Oct 15, 2026; sources GDP.pdf; 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).