Model comparison
o1 vs Claude Opus 4.8
OpenAI
o1
The first reasoning model - historically important, now superseded.
Anthropic
Claude Opus 4.8
Anthropic's heavyweight for hard reasoning and agentic work.
Specs
| Metric | o1 | Claude Opus 4.8 |
|---|---|---|
| Context window | 200K tokens | 1M tokens↑ |
| Input $/1M tokens | $15.00 | $5.00↑ |
| Output $/1M tokens | $60.00 | $25.00↑ |
| Modalities | Text · Image · File | Text · Image |
| Open weights | No | No |
| Released | Dec 2024 | May 2026 |
Capability differences
| Capability | o1 | Claude Opus 4.8 |
|---|---|---|
| Tool use | No | Yes |
| Vision | No | Yes |
| Prompt caching | No | Yes |
Key differences
- -o1 offers 200K context; Claude Opus 4.8 offers 1M.
- -Input pricing: o1 at $15.00/1M vs Claude Opus 4.8 at $5.00/1M.