# GPT-5.5 vs Grok 4.5

As of Oct 15, 2026, GPT-5.5 leads Grok 4.5 in 6 of 8 shared categories: General LLM, Reasoning, Long context, Vision, Factuality, and Abstraction (ARC).

GPT-5.5: $11.25 per 1M blended tokens.

Grok 4.5: $3 per 1M blended tokens.

GPT-5.5: closed weights.

Grok 4.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads Grok 4.5 in General LLM at #22 against #45.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads Grok 4.5 in Reasoning at #26 against #44.
- Which to pick, Science: As of Oct 15, 2026, Grok 4.5 leads GPT-5.5 in Science at #14 against #30.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Grok 4.5 leads GPT-5.5 in Coding › Web dev at #36 against #48.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads Grok 4.5 in Long context at #26 against #41.
- Which to pick, Vision: As of Oct 15, 2026, GPT-5.5 leads Grok 4.5 in Vision at #10 against #29.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads Grok 4.5 in Factuality at #5 against #30.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, GPT-5.5 leads Grok 4.5 in Abstraction (ARC) at #7 against #21.

As of Oct 15, 2026, GPT-5.5 is near state of the art, rank #5 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Grok 4.5 is ranked #14 in Science (since Oct 15, 2026; sources GPQA Diamond; methodology v1.0).