# GPT-5.5 vs Muse Spark 1.3

As of Oct 15, 2026, GPT-5.5 leads Muse Spark 1.3 in 1 of 6 shared categories: Factuality.

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

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

GPT-5.5: closed weights.

Muse Spark 1.3: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Muse Spark 1.3 leads GPT-5.5 in General LLM at #9 against #22.
- Which to pick, Reasoning: As of Oct 15, 2026, Muse Spark 1.3 leads GPT-5.5 in Reasoning at #8 against #26.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Muse Spark 1.3 leads GPT-5.5 in Coding › Web dev at #11 against #48.
- Which to pick, Long context: As of Oct 15, 2026, Muse Spark 1.3 leads GPT-5.5 in Long context at #15 against #26.
- Which to pick, Vision: As of Oct 15, 2026, Muse Spark 1.3 leads GPT-5.5 in Vision at #8 against #10.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads Muse Spark 1.3 in Factuality at #5 against #12.

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, 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).