GPT-5.4 vs Meta: Muse Spark 1.1
Compare GPT-5.4 by OpenAI against Meta: Muse Spark 1.1 by Meta AI, context windows of 1.1M vs 1.0M, tested across 53 shared challenges.
Our Verdict
GPT-5.4
Meta: 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.
Meta: Muse Spark 1.1 is 3.5x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.4
Input
$2.50
Output
$15.00
Meta: Muse Spark 1.1
Input
$1.25
2.0× cheaper
Output
$4.25
3.5× cheaper
Meta: Muse Spark 1.1 is cheaper on both — 2.0× input, 3.5× output
Writing DNA
Style Comparison
Similarity
39%
GPT-5.4
Meta: Muse Spark 1.1
54%Vocabulary61%
28wSentence Length20w
0.69Hedging0.10
4.1Bold3.7
8.1Lists2.0
0.00Emoji0.01
1.84Headings0.52
0.02Transitions0.02
Based on 22 + 29 text responses
Research
What we learned reading every model
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