Model comparison
Claude Haiku 4.5 vs o1
Anthropic
Claude Haiku 4.5
Fast, cheap, surprisingly capable for high-volume jobs.
OpenAI
o1
The first reasoning model — historically important, now superseded.
Specs
| Metric | Claude Haiku 4.5 | o1 |
|---|---|---|
| Context window | 200K tokens↑ | 200K tokens |
| Input $/1M tokens | $1.00↑ | $15.00 |
| Output $/1M tokens | $5.00↑ | $60.00 |
| Modalities | Image · Text | Text · Image · File |
| Open weights | No | No |
| Released | Oct 2025 | Dec 2024 |
Capability differences
| Capability | Claude Haiku 4.5 | o1 |
|---|---|---|
| Tool use | Yes | No |
| Vision | Yes | No |
| Prompt caching | Yes | No |
Key differences
- —Input pricing: Claude Haiku 4.5 at $1.00/1M vs o1 at $15.00/1M.