GPT-5vsGrok 3 Beta
GPT-5 is cheaper than Grok 3 Beta at $1.25/M vs $2/M input tokens.
| Spec | GPT-5 | Grok 3 Beta |
|---|---|---|
| Input price | $1.25/M tokens | $2/M tokens |
| Output price | $10/M tokens | $4/M tokens |
| Context window | 400K tokens | 131K tokens |
| Parameters | Not disclosed | Not disclosed |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Aug 2025 | Apr 2025 |
Our Verdict
GPT-5
Grok 3 BetaRunner-up
Not enough votes to call it. On the specs, GPT-5 has the edge: newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
GPT-5
Input
$1.25
1.6× cheaper
Output
$10.00
Grok 3 Beta
Input
$2.00
Output
$4.00
2.5× cheaper
GPT-5 wins input (1.6× cheaper)·Grok 3 Beta wins output (2.5× cheaper)
Where to run it
2 hosts
Grok 3 Beta
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
43%
Grok 3 Beta uses 16.4x more bold
GPT-5
Grok 3 Beta
65%Vocabulary51%
13wSentence Length19w
0.20Hedging0.59
0.2Bold3.1
4.6Lists5.0
0.00Emoji0.00
0.16Headings0.50
0.03Transitions0.28
Based on 16 + 28 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
