o3-mini vs Grok 3 Mini
Side-by-side API pricing and capability comparison
OpenAI
o3-mini
Cost-efficient reasoning model. Excels at science, math, and coding at fraction of o1 cost.
Input /1M
$1.10
Output /1M
$4.40
Context
200K
Tier
efficient
Prompt caching: $0.550/1M input
Full o3-mini pricing →xAI
Grok 3 Mini
Compact reasoning model from xAI — great value for logic, math, and structured tasks.
Input /1M
$0.300
Output /1M
$0.500
Context
131.072K
Tier
economy
Monthly Cost Comparison
| Usage scenario | o3-mini | Grok 3 Mini | Cheaper by |
|---|---|---|---|
Light usage 50K in + 20K out /day | $4.29 | $0.75 | Grok 3 Mini 83% cheaper |
Medium usage 500K in + 150K out /day | $36.30 | $6.75 | Grok 3 Mini 81% cheaper |
Heavy usage 3000K in + 1000K out /day | $231.00 | $42.00 | Grok 3 Mini 82% cheaper |
Feature Comparison
When to Use Each
Choose o3-mini when:
- You need a larger context window (200K vs 131K)
- You prefer OpenAI's ecosystem and tooling
Choose Grok 3 Mini when:
- Cost efficiency is critical — 73% cheaper input
- You prefer xAI's ecosystem and tooling
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