xAI: Grok 4.20 vs OpenAI: GPT-5 Pro
xAI: Grok 4.20 is cheaper on output tokens, while xAI: Grok 4.20 offers a larger context window. Choose xAI: Grok 4.20 or OpenAI: GPT-5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | xAI: Grok 4.20 | OpenAI: GPT-5 Pro |
|---|---|---|
| Provider | Kilo Gateway | Kilo Gateway |
| Input / 1M tokens | $2.00 | $15.00 |
| Output / 1M tokens | $6.00 | $120.00 |
| Context window | 2M | 400K |
| Parameters | 500B | — |
| Open weights | No | No |
| Released | Mar 2026 | Oct 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.