# Claude Opus 5 vs Muse Spark 1.3

As of Oct 15, 2026, Claude Opus 5 leads Muse Spark 1.3 in 5 of 8 shared categories: Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.

Claude Opus 5: $10 per 1M blended tokens.

Muse Spark 1.3: $2.0000000000000004 per 1M blended tokens.

Claude Opus 5: closed weights.

Muse Spark 1.3: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Muse Spark 1.3 leads Claude Opus 5 in General LLM at #9 against #11.
- Which to pick, Reasoning: As of Oct 15, 2026, Muse Spark 1.3 leads Claude Opus 5 in Reasoning at #8 against #9.
- Which to pick, Coding: As of Oct 15, 2026, Claude Opus 5 leads Muse Spark 1.3 in Coding at #4 against #18.
- Which to pick, Coding › Agentic: As of Oct 15, 2026, Claude Opus 5 leads Muse Spark 1.3 in Coding › Agentic at #4 against #18.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads Muse Spark 1.3 in Coding › Web dev at #6 against #11.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5 leads Muse Spark 1.3 in Long context at #9 against #15.
- Which to pick, Vision: As of Oct 15, 2026, Muse Spark 1.3 leads Claude Opus 5 in Vision at #8 against #12.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5 leads Muse Spark 1.3 in Factuality at #4 against #12.

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Muse Spark 1.3 is state of the art on best per dollar in Coding › Web dev (since Oct 14, 2026; sources LMArena WebDev; methodology v1.0).