GPT-5.5 vs Meta: Muse Spark 1.1
Compare GPT-5.5 by OpenAI against Meta: Muse Spark 1.1 by Meta AI, context windows of 1.1M vs 1.0M, tested across 54 shared challenges.
Our Verdict
GPT-5.5
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 7.1x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.5
Input
$5.00
Output
$30.00
Meta: Muse Spark 1.1
Input
$1.25
4.0× cheaper
Output
$4.25
7.1× cheaper
Meta: Muse Spark 1.1 is cheaper on both — 4.0× input, 7.1× output
Writing DNA
Style Comparison
Similarity
70%
GPT-5.5
Meta: Muse Spark 1.1
58%Vocabulary61%
18wSentence Length20w
0.74Hedging0.10
2.9Bold3.7
5.1Lists2.0
0.00Emoji0.01
1.68Headings0.52
0.03Transitions0.02
Based on 26 + 29 text responses
Research
What we learned reading every model
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