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.
Privacy first counting
TokenCalculator counts tokens in your browser when an Exact encoding is available. Prompt text does not need to leave your device for local counting.
Pricing snapshot
USD per 1 million tokens. Verify against the provider source before you lock budget.
| Rate | USD |
|---|---|
| Input / 1M | $15.00 |
| Output / 1M | $60.00 |
| Cached input / 1M | $7.50 |
Model details
| Detail | Value |
|---|---|
| Provider | OpenAI |
| Context window | 200K |
| Tokenizer | Exact (o200k_base) |
| Last verified | 2026-08-12 |
| API model id | o1 |
Notes
Reasoning tokens billed at output rate.
Related tools
- Estimate API cost
- Count tokens
- Check context fit
- Estimate cache savings
- Compare batch pricing
- Token visualizer
Related guides
- LLM API pricing
- Exact vs Approx
- OpenAI token calculator
- o200k vs cl100k: which OpenAI encoding counts your text?