# Claude Opus 4.5 vs Muse Spark 1.2

As of Oct 15, 2026, Claude Opus 4.5 leads Muse Spark 1.2 in 0 of 5 shared categories.

Claude Opus 4.5: $10 per 1M blended tokens.

Muse Spark 1.2: $2.0000000000000004 per 1M blended tokens.

Claude Opus 4.5: closed weights.

Muse Spark 1.2: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Opus 4.5 in General LLM at #8 against #41.
- Which to pick, Reasoning: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Opus 4.5 in Reasoning at #11 against #30.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Opus 4.5 in Coding › Web dev at #42 against #58.
- Which to pick, Long context: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Opus 4.5 in Long context at #17 against #20.
- Which to pick, Factuality: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Opus 4.5 in Factuality at #9 against #40.

As of Oct 15, 2026, Claude Opus 4.5 is a former state-of-the-art holder in Reasoning (since Dec 1, 2025; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 15, 2026, Muse Spark 1.2 is a former state-of-the-art holder in General LLM (since Sep 11, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).