Claude Opus 5 vs gpt-4-gizmo-*
| Anthropic Claude Claude Opus 5 | OpenAI gpt-4-gizmo-* | |
|---|---|---|
| Vendor | Anthropic Claude | OpenAI |
| Context window | 1,000,000 | — |
| Max output | 128,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | No |
| Input | text, image, file | text, image |
| Output | text | text |
| Released | 2026-07-24 | — |