o3-pro (Frontier Reasoning) charges $20.00 per 1M input tokens and $80.00 per 1M output tokens (cached input: $2.00/M). Real bills depend on your input/output split — the tables below price o3-pro (Frontier Reasoning) at 1K–1M tokens across common workload shapes. Verified Aug 19, 2026
Cost by token volume
| Volume | Input-heavy (90/10) | Balanced (70/30) | Output-heavy (30/70) | All input | All output |
|---|---|---|---|---|---|
| 1,000 tokens | $0.026 | $0.038 | $0.062 | $0.02 | $0.08 |
| 10,000 tokens | $0.26 | $0.38 | $0.62 | $0.20 | $0.80 |
| 100,000 tokens | $2.60 | $3.80 | $6.20 | $2.00 | $8.00 |
| 1 million tokens | $26.00 | $38.00 | $62.00 | $20.00 | $80.00 |
Uncached. Volume links open interactive pages with adjustable splits.
Prompt caching impact
| Cached share of input | Chat request (4K in / 800 out) | Monthly @ 10K req/day | Savings / month |
|---|---|---|---|
| 0% | $0.144 | $43,200.00 | — |
| 50% | $0.108 | $32,400.00 | −$10,800.00 |
| 75% | $0.09 | $27,000.00 | −$16,200.00 |
Monthly projections
| Scale | Requests / day | Chat workload / month | Agentic workload / month* |
|---|---|---|---|
| 100 req/day | 3,000 | $324.00 | $1,356.00 |
| 1K req/day | 30,000 | $3,240.00 | $13,560.00 |
| 10K req/day | 300,000 | $32,400.00 | $135,600.00 |
| 100K req/day | 3,000,000 | $324,000.00 | $1,356,000.00 |
Chat: 4K in / 800 out, 50% cached. *Agentic: 40K in / 1.5K out, 65% cached. Model your exact mix in the monthly cost calculator.
FAQ
1M purely input tokens cost $20.00; 1M purely output tokens cost $80.00. A typical mixed workload lands in between — see the volume table for exact splits.
A chat-style request (4,000 input + 800 output) costs about $0.108 with 50% cached input, or $0.144 without caching.
At 1,000 requests/day of a chat workload (4K in / 800 out, 50% cached): $3,240.00/month. At 10,000 requests/day: $32,400.00/month. Model your exact mix with the monthly cost calculator.