# Claude Sonnet 5.5 vs Muse Spark 1.2

As of Oct 15, 2026, Claude Sonnet 5.5 leads Muse Spark 1.2 in 3 of 6 shared categories: Coding › Web dev, Long context, and Vision.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

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

Claude Sonnet 5.5: closed weights.

Muse Spark 1.2: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Sonnet 5.5 in General LLM at #8 against #29.
- Which to pick, Reasoning: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Sonnet 5.5 in Reasoning at #11 against #18.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Muse Spark 1.2 in Coding › Web dev at #3 against #42.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads Muse Spark 1.2 in Long context at #11 against #17.
- Which to pick, Vision: As of Oct 15, 2026, Claude Sonnet 5.5 leads Muse Spark 1.2 in Vision at #1 against #27.
- Which to pick, Factuality: As of Oct 15, 2026, Muse Spark 1.2 leads Claude Sonnet 5.5 in Factuality at #9 against #17.

As of Oct 15, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; 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).