GPT-5.1vsSolar Pro 3
Solar Pro 3 is cheaper than GPT-5.1 at $0/M vs $1.25/M input tokens.
| Spec | GPT-5.1 | Solar Pro 3 |
|---|---|---|
| Input price | $1.25/M tokens | Free |
| Output price | $10/M tokens | Free |
| Context window | 400K tokens | 128K tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Jan 2026 |
Our Verdict
GPT-5.1
Solar Pro 3Runner-up
Not enough votes to call it. On the specs, GPT-5.1 has the edge: bigger model tier, bigger context window, major provider backing.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-5.1
Input
$1.25
Output
$10.00
Solar Pro 3
Input
$0.000
Output
$0.000
Where to run it
2 hosts
Solar Pro 3
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
33%
Solar Pro 3 uses 17.3x more emoji
GPT-5.1
Solar Pro 3
62%Vocabulary50%
19wSentence Length21w
0.29Hedging0.42
3.5Bold6.5
7.2Lists2.2
0.00Emoji0.17
0.61Headings0.56
0.03Transitions0.12
Based on 14 + 18 text responses
Research
What we learned reading every model
FAQ
Common questions
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