Compare models
Prices, specs and price history side by side. Data as of 2026-08-02
| Spec | Grok 4.5xAI | GPT-5 NanoOpenAI |
|---|---|---|
| Provider | xAI | OpenAI |
| Context window | 500K | 400K |
| Max output | - | 128K |
| Modalities | text, image, file → text | text, image, file → text |
| Open source | No | No |
| License | - | - |
| Released | - | - |
| Status | active | active |
| Input$ / 1M | 2 | 0.05cheapest |
| Output$ / 1M | 6 | 0.4cheapest |
| Cached$ / 1M | 0.5 | 0.005cheapest |
| Channel | openrouter | openrouter |
Price history
Overlaid price history. Solid = verified by us, dashed = estimated (archive).
Grok 4.5GPT-5 Nanoverified by usestimated (archive)