Model comparison
Grok 4.20 vs o3
xAI
Grok 4.20
xAI's fourth-generation model with a 2M-token context window.
OpenAI
o3
OpenAI's mainstream reasoning model - production-viable thinking.
Specs
| Metric | Grok 4.20 | o3 |
|---|---|---|
| Context window | 2M tokens↑ | 200K tokens |
| Input $/1M tokens | $1.25↑ | $2.00 |
| Output $/1M tokens | $2.50↑ | $8.00 |
| Modalities | Text · Image · File | Image · Text · File |
| Open weights | No | No |
| Released | Mar 2026 | Apr 2025 |
Capability differences
| Capability | Grok 4.20 | o3 |
|---|---|---|
| Vision | Yes | No |
Key differences
- -Grok 4.20 offers 2M context; o3 offers 200K.
- -Input pricing: Grok 4.20 at $1.25/1M vs o3 at $2.00/1M.