GPT-5.4 charges $2.50 per 1M input tokens and $15.00 per 1M output tokens (cached input: $0.25/M). Real bills depend on your input/output split — the tables below price GPT-5.4 at 1K–1M tokens across common workload shapes. Verified Aug 16, 2026
Cost by token volume
| Volume | Input-heavy (90/10) | Balanced (70/30) | Output-heavy (30/70) | All input | All output |
|---|---|---|---|---|---|
| 1,000 tokens | $0.00375 | $0.00625 | $0.0113 | $0.0025 | $0.015 |
| 10,000 tokens | $0.0375 | $0.0625 | $0.1125 | $0.025 | $0.15 |
| 100,000 tokens | $0.375 | $0.625 | $1.125 | $0.25 | $1.50 |
| 1 million tokens | $3.75 | $6.25 | $11.25 | $2.50 | $15.00 |
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% | $0.022 | $6,600.00 | — |
| 50% | $0.0175 | $5,250.00 | −$1,350.00 |
| 75% | $0.0153 | $4,575.00 | −$2,025.00 |
Monthly projections
| Scale | Requests / day | Chat workload / month | Agentic workload / month* |
|---|---|---|---|
| 100 req/day | 3,000 | $52.50 | $192.00 |
| 1K req/day | 30,000 | $525.00 | $1,920.00 |
| 10K req/day | 300,000 | $5,250.00 | $19,200.00 |
| 100K req/day | 3,000,000 | $52,500.00 | $192,000.00 |
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 $2.50; 1M purely output tokens cost $15.00. 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 $0.0175 with 50% cached input, or $0.022 without caching.
At 1,000 requests/day of a chat workload (4K in / 800 out, 50% cached): $525.00/month. At 10,000 requests/day: $5,250.00/month. Model your exact mix with the monthly cost calculator.