GPT-5 vs Claude Haiku 4.5
| OpenAI GPT-5 | Anthropic Claude Claude Haiku 4.5 | |
|---|---|---|
| Vendor | OpenAI | Anthropic Claude |
| Context window | 400,000 | 200,000 |
| Max output | 128,000 | 64,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | text | text |
| Released | 2025-08-07 | 2025-10-01 |