GPT-5 ProvsSolar Pro 3
Solar Pro 3 is cheaper than GPT-5 Pro at $0/M vs $15/M input tokens.
| Spec | GPT-5 Pro | Solar Pro 3 |
|---|---|---|
| Input price | $15/M tokens | Free |
| Output price | $120/M tokens | Free |
| Context window | 400K tokens | 128K tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Oct 2025 | Jan 2026 |
Our Verdict
GPT-5 Pro
Solar Pro 3Runner-up
Not enough votes to call it. On the specs, GPT-5 Pro has the edge: bigger model tier, bigger context window, major provider backing.
Too close to call
API pricing
Cost per 1M tokens
GPT-5 Pro
Input
$15.00
Output
$120.00
Solar Pro 3
Input
$0.000
Output
$0.000
Where to run it
1 host
GPT-5 Pro1 host
Solar Pro 3
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Writing DNA
Style Comparison
Similarity
45%
Solar Pro 3 uses 654.8x more bold
GPT-5 Pro
Solar Pro 3
65%Vocabulary50%
15wSentence Length21w
0.32Hedging0.42
0.0Bold6.5
2.9Lists2.2
0.00Emoji0.17
0.00Headings0.56
0.01Transitions0.12
Based on 11 + 18 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
More comparisons
GPT-5 Pro vs Ox AlphaNew provider
GPT-5 Pro vs MiniMax M2.7New provider
GPT-5 Pro vs MiniMax M3New provider
GPT-5 Pro vs Aurora AlphaNew provider
GPT-5 Pro vs Claude Sonnet 5New provider
Solar Pro 3 vs OpenAI Codex MiniCross-provider
GPT-5 Pro vs Cypher Alpha (free)New provider
GPT-5 Pro vs DeepSeek V3.1New provider