# Claude Opus 5.5 vs Grok 4 0709

As of Oct 14, 2026, Claude Opus 5.5 leads Grok 4 0709 in 6 of 6 shared categories: General LLM, Reasoning, Science, Long context, Factuality, and Abstraction (ARC).

Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.

Grok 4 0709: price per 1M tokens is unset in the catalog.

Claude Opus 5.5: closed weights.

Grok 4 0709: closed weights.

- Which to pick, General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Grok 4 0709 in General LLM at #2 against #106.
- Which to pick, Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Grok 4 0709 in Reasoning at #1 against #110.
- Which to pick, Science: As of Oct 14, 2026, Claude Opus 5.5 leads Grok 4 0709 in Science at #31 against #51.
- Which to pick, Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Grok 4 0709 in Long context at #1 against #106.
- Which to pick, Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Grok 4 0709 in Factuality at #1 against #96.
- Which to pick, Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads Grok 4 0709 in Abstraction (ARC) at #1 against #33.

As of Oct 14, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 14, 2026, Grok 4 0709 is ranked #33 in Abstraction (ARC) (since Oct 14, 2026; sources ARC-AGI; methodology v1.0).