o1 (Reasoning) charges $15.00 per 1M input tokens and $60.00 per 1M output tokens (cached input: $7.50/M). Real bills depend on your input/output split — the tables below price o1 (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 | $0.0195 | $0.0285 | $0.0465 | $0.015 | $0.06 |
| 10,000 tokens | $0.195 | $0.285 | $0.465 | $0.15 | $0.60 |
| 100,000 tokens | $1.95 | $2.85 | $4.65 | $1.50 | $6.00 |
| 1 million tokens | $19.50 | $28.50 | $46.50 | $15.00 | $60.00 |
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% | $0.108 | $32,400.00 | — |
| 50% | $0.093 | $27,900.00 | −$4,500.00 |
| 75% | $0.0855 | $25,650.00 | −$6,750.00 |
Monthly projections
| Scale | Requests / day | Chat workload / month | Agentic workload / month* |
|---|---|---|---|
| 100 req/day | 3,000 | $279.00 | $1,485.00 |
| 1K req/day | 30,000 | $2,790.00 | $14,850.00 |
| 10K req/day | 300,000 | $27,900.00 | $148,500.00 |
| 100K req/day | 3,000,000 | $279,000.00 | $1,485,000.00 |
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 $15.00; 1M purely output tokens cost $60.00. 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 $0.093 with 50% cached input, or $0.108 without caching.
At 1,000 requests/day of a chat workload (4K in / 800 out, 50% cached): $2,790.00/month. At 10,000 requests/day: $27,900.00/month. Model your exact mix with the monthly cost calculator.