ChatGPT-4o (March 2025)vsMiniMax M2.1
MiniMax M2.1 is the newer model, released after ChatGPT-4o (March 2025).
| Spec | ChatGPT-4o (March 2025) | MiniMax M2.1 |
|---|---|---|
| Input price | $5/M tokens | — |
| Output price | $15/M tokens | — |
| Context window | 128K tokens | — |
| Weights | — | Open |
| Free API (OpenRouter) | No | No |
| Released | Mar 2025 | Dec 2025 |
Our Verdict
ChatGPT-4o (March 2025)
MiniMax M2.1Runner-up
Not enough votes to call it. On the specs, ChatGPT-4o (March 2025) 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
ChatGPT-4o (March 2025)
Input
$5.00
Output
$15.00
MiniMax M2.1
Input
—
Output
—
Where to run it
2 hosts
ChatGPT-4o (March 2025)
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
48%
ChatGPT-4o (March 2025) uses 16.0x more emoji
ChatGPT-4o (March 2025)
MiniMax M2.1
55%Vocabulary51%
24wSentence Length20w
0.52Hedging0.60
3.3Bold3.3
6.0Lists1.1
0.94Emoji0.06
0.63Headings0.68
0.05Transitions0.11
Based on 15 + 28 text responses
Research
What we learned reading every model
FAQ
Common questions
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