# GPT-5.5 Instant vs GPT-6 Astra

As of Oct 14, 2026, GPT-5.5 Instant leads GPT-6 Astra in 0 of 5 shared categories.

GPT-5.5 Instant: price per 1M tokens is unset in the catalog.

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

GPT-5.5 Instant: closed weights.

GPT-6 Astra: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, GPT-6 Astra leads GPT-5.5 Instant in General LLM at #25 against #31.
- Which to pick, Reasoning: As of Oct 14, 2026, GPT-6 Astra leads GPT-5.5 Instant in Reasoning at #23 against #33.
- Which to pick, Science: As of Oct 14, 2026, GPT-6 Astra leads GPT-5.5 Instant in Science at #2 against #65.
- Which to pick, Long context: As of Oct 14, 2026, GPT-6 Astra leads GPT-5.5 Instant in Long context at #22 against #39.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-6 Astra leads GPT-5.5 Instant in Factuality at #25 against #64.

As of Oct 14, 2026, GPT-5.5 Instant is ranked #31 in General LLM (since Oct 14, 2026; sources LMArena Text (style-controlled, overall); 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).