GPT-4o (Omni)vso3 Mini
o3 Mini is cheaper than GPT-4o (Omni) at $1.1/M vs $2.5/M input tokens.
| Spec | GPT-4o (Omni) | o3 Mini |
|---|---|---|
| Input price | $2.5/M tokens | $1.1/M tokens |
| Output price | $10/M tokens | $4.4/M tokens |
| Context window | 128K tokens | 64K tokens |
| Parameters | Not disclosed | Not disclosed |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | May 2024 | Dec 2024 |
| MMLU | 88.7% | 85.9% |
Our Verdict
GPT-4o (Omni)
o3 MiniRunner-up
Not enough votes to call it. On the specs, GPT-4o (Omni) has the edge: bigger model tier, bigger context window.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-4o (Omni)
Input
$2.50
Output
$10.00
o3 Mini
Input
$1.10
2.3× cheaper
Output
$4.40
2.3× cheaper
o3 Mini is cheaper on both: 2.3× input, 2.3× output.
Where to run it
3 hosts
o3 Mini1 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
47%
GPT-4o (Omni) uses 2.5x more emoji
GPT-4o (Omni)
o3 Mini
54%Vocabulary65%
18wSentence Length18w
0.72Hedging0.84
7.3Bold2.8
5.6Lists1.5
0.03Emoji0.00
1.40Headings0.33
0.26Transitions0.29
Based on 24 + 17 text responses
Research
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