Model comparison
o3 vs Grok 4.20
OpenAI
o3
OpenAI's mainstream reasoning model - production-viable thinking.
xAI
Grok 4.20
xAI's fourth-generation model with a 2M-token context window.
Specs
| Metric | o3 | Grok 4.20 |
|---|---|---|
| Context window | 200K tokens | 2M tokens↑ |
| Input $/1M tokens | $2.00 | $1.25↑ |
| Output $/1M tokens | $8.00 | $2.50↑ |
| Modalities | Image · Text · File | Text · Image · File |
| Open weights | No | No |
Capability differences
| Capability | o3 | Grok 4.20 |
|---|---|---|
| Vision | No | Yes |
Key differences
- -o3 offers 200K context; Grok 4.20 offers 2M.
- -Input pricing: o3 at $2.00/1M vs Grok 4.20 at $1.25/1M.