gpt-4 vs Claude Sonnet 4.5
| OpenAI gpt-4 | Anthropic Claude Claude Sonnet 4.5 | |
|---|---|---|
| Vendor | OpenAI | Anthropic Claude |
| Context window | 8,192 | 200,000 |
| Max output | 8,192 | 64,000 |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text | text, image, file |
| Output | text | text |
| Released | 2023-11-06 | 2025-09-29 |