O3 pricing
Source: litellm · updated 2026-10-27
Short answer: O3 costs $2.00 per million input tokens and $8.00 per million output tokens. That is a 3:1 blended rate of $3.50 per million tokens, ranking it #596 of 704 tracked models by input price.
Price breakdown
| Metric | USD |
|---|---|
| Input, per 1M tokens | $2.00 |
| Output, per 1M tokens | $8.00 |
| Output รท input multiple | 4.00× |
| 3:1 blended, per 1M tokens | $3.50 |
| Context window | 200,000 tokens |
What a typical workload costs
| Monthly volume | Input cost | Output cost | Total | 1M in / 250K out | $2.00 | $2.00 | $4.00 |
|---|---|---|---|---|---|---|---|
| 10M in / 2.5M out | $20.00 | $20.00 | $40.00 | ||||
| 100M in / 25M out | $200 | $200 | $400 |
Other o3 models
| Model | Input | Output |
|---|---|---|
| O3 Mini | $1.10 | $4.40 |
| O3 Deep Research | $10.00 | $40.00 |
| O3 Pro | $20.00 | $80.00 |
Cheaper alternatives
Next cheaper option: Gemini 2.5 Pro at $1.25 per 1M input tokens. Next step up: Pareto 26.9 at $2.50 per 1M input tokens.