Side by side pricing and context for o1-preview and o1. Rates are curated catalog values with last verified dates on each model page.
o1-preview
Early o1 preview id kept for historical cost audits. Prefer o3 or GPT-5 reasoning paths unless an old integration still pins o1-preview.
Input $15.00 / Output $60.00 per 1M
Context 128K · Exact (o200k_base)
o1
Legacy high-cost OpenAI reasoning model kept for historical budget comparisons. Prefer o3 or GPT-5 reasoning paths for new work unless you are pinned to o1.
Input $15.00 / Output $60.00 per 1M
Context 200K · Exact (o200k_base)
Quick take
- Input rates match on this snapshot.
- Output rates match on this snapshot.
- Both last verified on their model pages (2026-08-02 / 2026-08-02).
Rate table
| Metric | o1-preview | o1 |
|---|---|---|
| Input / 1M | $15.00 | $15.00 |
| Output / 1M | $60.00 | $60.00 |
| Cached input / 1M | n/a | $7.50 |
| Context | 128K | 200K |
| Tokenizer | Exact (o200k_base) | Exact (o200k_base) |