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The first reasoning model - historically important, now superseded.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