# GPT-4.5 Preview vs Muse Spark

As of Oct 15, 2026, GPT-4.5 Preview leads Muse Spark in 0 of 5 shared categories.

GPT-4.5 Preview: price per 1M tokens is unset in the catalog.

Muse Spark: price per 1M tokens is unset in the catalog.

GPT-4.5 Preview: closed weights.

Muse Spark: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Muse Spark leads GPT-4.5 Preview in General LLM at #12 against #79.
- Which to pick, Reasoning: As of Oct 15, 2026, Muse Spark leads GPT-4.5 Preview in Reasoning at #17 against #121.
- Which to pick, Math: As of Oct 15, 2026, Muse Spark leads GPT-4.5 Preview in Math at #7 against #38.
- Which to pick, Science: As of Oct 15, 2026, Muse Spark leads GPT-4.5 Preview in Science at #37 against #92.
- Which to pick, Long context: As of Oct 15, 2026, Muse Spark leads GPT-4.5 Preview in Long context at #44 against #93.

As of Oct 15, 2026, GPT-4.5 Preview is a former state-of-the-art holder in General LLM (since Oct 17, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 15, 2026, Muse Spark is a former state-of-the-art holder in General LLM (since May 18, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).