Smaller reasoning model when o3 is too expensive. Use for math, planning, and agent steps where you need chain-of-thought style work on a budget.
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Pricing snapshot
USD per 1 million tokens. Verify against the provider source before you lock budget.
| Rate | USD |
|---|---|
| Input / 1M | $1.10 |
| Output / 1M | $4.40 |
| Cached input / 1M | $0.275 |
| Batch input / 1M | $0.550 |
| Batch output / 1M | $2.20 |
Model details
| Detail | Value |
|---|---|
| Provider | OpenAI |
| Context window | 200K |
| Tokenizer | Exact (o200k_base) |
| Last verified | 2026-08-02 |
| API model id | o4-mini |