Codex vs Grok 4.20 0309 v2
OpenAI vs xAI — benchmarks, pricing, and capabilities side by side.
| Codex | Grok 4.20 0309 v2 | |
|---|---|---|
| Intelligence index | — | 91.1 |
| Developer | OpenAI | xAI |
| Type | LLM | LLM |
| Access | API only | — |
| Context window | — | — |
| Input price | — | $2.00 / 1M |
| Output price | — | $6.00 / 1M |
| Speed | — | 105 tok/s |
| Released | August 10, 2021 | April 7, 2026 |
| Parameters | — | — |
| Input modalities | Text | — |
| Output modalities | Text | — |