Model comparison
GPT-5.4 vs Grok 4.20
OpenAI
GPT-5.4
OpenAI's flagship - broadest modality and ecosystem coverage.
xAI
Grok 4.20
xAI's fourth-generation model with a 2M-token context window.
Specs
| Metric | GPT-5.4 | Grok 4.20 |
|---|---|---|
| Context window | 1.1M tokens | 2M tokens↑ |
| Input $/1M tokens | $2.50 | $1.25↑ |
| Output $/1M tokens | $15.00 | $2.50↑ |
| Modalities | Text · Image · File | Text · Image · File |
| Open weights | No | No |
Capability differences
| Capability | GPT-5.4 | Grok 4.20 |
|---|---|---|
| Prompt caching | Yes | No |
Key differences
- -GPT-5.4 offers 1.1M context; Grok 4.20 offers 2M.
- -Input pricing: GPT-5.4 at $2.50/1M vs Grok 4.20 at $1.25/1M.