Model comparison
o3 vs Claude Haiku 4.5
OpenAI
o3
OpenAI's mainstream reasoning model - production-viable thinking.
Anthropic
Claude Haiku 4.5
Fast, cheap, surprisingly capable for high-volume jobs.
Specs
| Metric | o3 | Claude Haiku 4.5 |
|---|---|---|
| Context window | 200K tokens↑ | 200K tokens |
| Input $/1M tokens | $2.00 | $1.00↑ |
| Output $/1M tokens | $8.00 | $5.00↑ |
| Modalities | Image · Text · File | Text · Image · File |
| Open weights | No | No |
| Released | Apr 2025 | Oct 2025 |
Capability differences
| Capability | o3 | Claude Haiku 4.5 |
|---|---|---|
| Vision | No | Yes |
| Prompt caching | No | Yes |
Key differences
- -Input pricing: o3 at $2.00/1M vs Claude Haiku 4.5 at $1.00/1M.