Gemini 1.5 ProvsGPT-4o mini
GPT-4o mini is cheaper than Gemini 1.5 Pro at $0.15/M vs $3.5/M input tokens.
| Spec | Gemini 1.5 Pro | GPT-4o mini |
|---|---|---|
| Input price | $3.5/M tokens | $0.15/M tokens |
| Output price | $10.5/M tokens | $0.6/M tokens |
| Context window | 1.0M tokens | 128K tokens |
| Weights | — | Closed |
| Free API (OpenRouter) | No | No |
| Released | Feb 2024 | Jul 2024 |
| MMLU | 86.0% | 82% |
Our Verdict
Gemini 1.5 Pro
GPT-4o miniRunner-up
Not enough votes to call it. On the specs, Gemini 1.5 Pro has the edge: bigger model tier, bigger context window.
GPT-4o mini costs 18x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Gemini 1.5 Pro
Input
$3.50
Output
$10.50
GPT-4o mini
Input
$0.15
23× cheaper
Output
$0.60
18× cheaper
GPT-4o mini is cheaper on both: 23× input, 18× output.
Where to run it
2 hosts
Gemini 1.5 Pro
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
62%
GPT-4o mini uses 12.9x more headings
Gemini 1.5 Pro
GPT-4o mini
61%Vocabulary53%
15wSentence Length19w
0.80Hedging0.82
3.7Bold4.0
3.3Lists3.7
0.00Emoji0.00
0.08Headings1.04
0.09Transitions0.22
Based on 8 + 24 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
More comparisons
Gemini 1.5 Pro vs Ox AlphaNew provider
GPT-4o mini vs Muse Spark 1.1New provider
GPT-4o mini vs Muse Spark 1.3New provider
GPT-4o mini vs Gemini 3.6 FlashCross-provider
Gemini 1.5 Pro vs MiMo-V2-ProNew provider
Gemini 1.5 Pro vs MiMo-V2.5New provider
Gemini 1.5 Pro vs MiMo-V2.5-ProNew provider
Gemini 1.5 Pro vs MiniMax M1New provider