Mistral Large 4 Preview vs Muse Spark Open compared

There is very little daylight between Mistral Large 4 Preview (Mistral) and Muse Spark Open (Xhigh) (Meta) on the overall index. All numbers are the catalogue's recorded values; nobody ran either model by hand for this page. The sharpest difference is price: Mistral Large 4 Preview costs $2.10 per million output tokens, against $4.25 for Muse Spark Open.

Running costs

Per million tokens, Mistral Large 4 Preview charges $0.70 for input and $2.10 for output, while Muse Spark Open charges $1.25 and $4.25. Muse Spark Open costs twice as much per output token.

A reference job of 1 million input tokens and 200,000 output tokens costs $1.12 with Mistral Large 4 Preview and $2.10 with Muse Spark Open, so Mistral Large 4 Preview saves $0.98. A bigger example, a support assistant answering 10,000 conversations of 2,000 input and 500 output tokens each, costs $24.50 on Mistral Large 4 Preview and $46.25 on Muse Spark Open: a gap of $21.75. Blended at three input tokens per output token, the effective rates are $1.05 for Mistral Large 4 Preview and $2.00 for Muse Spark Open.

Overall capability: effectively tied

With 25.3 for Mistral Large 4 Preview and 24.9 for Muse Spark Open, the headline index barely separates them. That is close enough to call a draw on this measure.

Among 109 active scored models, Mistral Large 4 Preview sits 67th and Muse Spark Open 68th.

There are no coding or math index scores for either model in the catalogue, which keeps this comparison at the aggregate level.

Muse Spark Open is the faster writer

Once a response is under way, Mistral Large 4 Preview produces roughly 130 tokens per second against 207 tokens per second for Muse Spark Open. That makes Muse Spark Open roughly 1.6 times as fast at writing. Before any text appears, Mistral Large 4 Preview takes 1.9 seconds and Muse Spark Open 0.94 seconds. Muse Spark Open gets to its first token 2.1 times as fast.

For a 1,000-token response, first token plus generation comes to roughly 9.6 seconds on Mistral Large 4 Preview and 5.8 seconds on Muse Spark Open.

Release timing

The release dates are October 6, 2026 for Mistral Large 4 Preview and October 15, 2026 for Muse Spark Open, 9 days apart. That is close enough to count them as the same generation.

Score per dollar

Dividing the blended price by the intelligence index gives a rough cost per point: $0.042 for Mistral Large 4 Preview and $0.080 for Muse Spark Open, per million tokens. With scores this close, Mistral Large 4 Preview is simply the cheaper way to buy the same capability.