GPT-5.4 Pro vs Muse Spark 1.1
Compare GPT-5.4 Pro by OpenAI against Muse Spark 1.1 by Meta AI, context windows of 1.1M vs 1.0M, tested across 18 shared challenges.
Our Verdict
GPT-5.4 Pro
Muse Spark 1.1
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Muse Spark 1.1 is 42x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.4 Pro
Input
$30.00
Output
$180.00
Muse Spark 1.1
Input
$1.25
24× cheaper
Output
$4.25
42× cheaper
Muse Spark 1.1 is cheaper on both — 24× input, 42× output
Writing DNA
Style Comparison
Similarity
37%
GPT-5.4 Pro
Muse Spark 1.1
50%Vocabulary61%
35wSentence Length20w
0.70Hedging0.10
7.5Bold3.7
8.3Lists2.0
0.00Emoji0.01
2.52Headings0.52
0.01Transitions0.02
Based on 12 + 29 text responses
Research
What we learned reading every model
FAQ
Common questions
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