Compare models
Prices, specs and price history side by side. Data as of 2026-08-02
| Spec | Claude Opus 4.5Anthropic | GPT-5.1 ChatOpenAI |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Context window | 200K | 128K |
| Max output | 64K | 16K |
| Modalities | file, image, text → text | file, image, text → text |
| Open source | No | No |
| License | - | - |
| Released | - | - |
| Status | active | active |
| Input$ / 1M | 5 | 1.25cheapest |
| Output$ / 1M | 25 | 10cheapest |
| Cached$ / 1M | 0.5 | 0.125cheapest |
| Channel | openrouter | openrouter |
Price history
Overlaid price history. Solid = verified by us, dashed = estimated (archive).
Claude Opus 4.5GPT-5.1 Chatverified by usestimated (archive)