Muse Spark 1.2

Aug 2026
Muse Spark 1.2
Compare in
on
—per task?
$1.25 / $4.25per 1M in / outcache $0.15
—output speed?
1Mcontext

Alternatives?

History

4 versions
00.20.40.60.8Release dateLech Mazur Short-Story1.11.21.3
00.20.40.60.8Release dateLech Mazur Short-Story1.11.21.3

Benchmarks

in Writing & Language

Watch out 2

Only auto tool_choice is supported›

tool_choice none, required or a named function returns HTTP 400; use auto and handle either a tool call or text. Source ↗

Reasoning cannot be disabled›

Muse Wonder and Muse Spark do not support disabling reasoning with none; keep reasoning enabled. Source ↗

FAQ

How much does Muse Spark 1.2 cost?›

$1.25 per 1M input tokens and $4.25 per 1M output tokens; cached input $0.15 per 1M.

Is Muse Spark 1.2 free to use?›

There is no free API; the cheapest paid price is $1.25 per 1M input tokens.

How good is Muse Spark 1.2, and what is it best at?›

#24 of 336 in Chat & Knowledge, #43 of 134 in Coding, #44 of 135 in Agents & Tool Use, #38 of 197 in Writing & Language, #11 of 37 in Vision & Documents. Strongest at: Agents & work tasks, Reasoning, Science, Long context, Knowledge.

Is Muse Spark 1.2 better than Muse Spark 1.1?›

On Lech Mazur Short-Story, Muse Spark 1.2 scores -0.1 vs 0.7 — about the same.

How can I use Muse Spark 1.2?›

Through the API of Meta.

What is the context window of Muse Spark 1.2?›

1M tokens, with up to 944K output tokens.

When was Muse Spark 1.2 released? Is there a newer version?›

Released 2026-08-05. It has been superseded by Muse Spark 1.3.

Is Muse Spark 1.2 open source?›

No, Muse Spark 1.2 is a closed model available through an API. The closest open-weights option here is GLM 5.3.

Can Muse Spark 1.2 read images?›

It accepts text and images, PDF files, video as input.

What is Muse Spark 1.2?›

Muse Spark 1.2 is a closed language model from Meta, released Aug 2026, the successor to Muse Spark 1.1.

What are the best alternatives to Muse Spark 1.2?›

MiMo v2.6 Pro (cheaper), GPT-5.6 Sol (better), GLM 5.3 (open weights).