GPT-5 MinivsMuse Spark 1.3
GPT-5 Mini is cheaper than Muse Spark 1.3 at $0.25/M vs $1.25/M input tokens.
| Spec | GPT-5 Mini | Muse Spark 1.3 |
|---|---|---|
| Input price | $0.25/M tokens | $1.25/M tokens |
| Output price | $2/M tokens | $4.25/M tokens |
| Context window | — | 1.0M tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Aug 2025 | Sep 2026 |
Our Verdict
Muse Spark 1.3
GPT-5 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.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-5 Mini
Input
$0.25
5.0× cheaper
Output
$2.00
2.1× cheaper
Muse Spark 1.3
Input
$1.25
Output
$4.25
GPT-5 Mini is cheaper on both: 5.0× input, 2.1× output.
Where to run it
3 hosts
Muse Spark 1.31 host
Per million tokens. Prices and uptime via OpenRouter, checked 11 Sep 2026.
Writing DNA
Style Comparison
Similarity
57%
Muse Spark 1.3 uses 258.0x more bold
GPT-5 Mini
Muse Spark 1.3
62%Vocabulary59%
22wSentence Length14w
0.21Hedging0.28
0.0Bold2.6
3.8Lists2.3
0.00Emoji0.00
0.00Headings0.48
0.04Transitions0.02
Based on 21 + 27 text responses
Research
What we learned reading every model
FAQ
Common questions
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