GPT-4o minivsMuse Spark 1.3
GPT-4o mini is cheaper than Muse Spark 1.3 at $0.15/M vs $1.25/M input tokens.
| Spec | GPT-4o mini | Muse Spark 1.3 |
|---|---|---|
| Input price | $0.15/M tokens | $1.25/M tokens |
| Output price | $0.6/M tokens | $4.25/M tokens |
| Context window | 128K tokens | 1.0M tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2024 | Sep 2026 |
Our Verdict
Muse Spark 1.3
GPT-4o miniRunner-up
Not enough votes to call it. On the specs, Muse Spark 1.3 has the edge: bigger model tier, newer, bigger context window.
GPT-4o mini costs 7.1x less per token.
Slight edge
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-4o mini
Input
$0.15
8.3× cheaper
Output
$0.60
7.1× cheaper
Muse Spark 1.3
Input
$1.25
Output
$4.25
GPT-4o mini is cheaper on both: 8.3× input, 7.1× output.
Where to run it
3 hosts
Muse Spark 1.31 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
44%
GPT-4o mini uses 12.2x more transitions
GPT-4o mini
Muse Spark 1.3
53%Vocabulary59%
19wSentence Length14w
0.82Hedging0.28
4.0Bold2.6
3.7Lists2.3
0.00Emoji0.00
1.04Headings0.48
0.22Transitions0.02
Based on 24 + 27 text responses
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FAQ
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