OpenAI
GPT-5.5 Pro token cost
Top GPT-5.5 Pro tier for the hardest reasoning, research, and long-horizon agent workloads.
Published list rates
Input
$30.00
per 1M tokens
Output
$180.00
per 1M tokens
Context window
1,000,000
tokens
Pricing source: OpenAI API pricing
Estimate cost
Estimate from text
Calculate from a token total
Project monthly volume
Daily requests × tokens per request × 30 days.
Estimated cost
- Estimated tokens
- 100,000
- Characters
- 400,000
- Words
- 75,000
- Input tokens
- 70,000
- Output tokens
- 30,000
- Input cost
- $2.10
- Output cost
- $5.40
- Total cost
- $7.50
- Combined price per 1M tokens
- $75.00
- Estimated monthly cost
- $4,500.00
- Estimated daily cost
- $150.00
Cost as volume grows
What GPT-5.5 Pro costs if you only send tokens, only get a reply, or do both (70% in / 30% out). Rows start small and go up to huge traffic.
| Tokens | Input only | Output only | Mix (70% in / 30% out) |
|---|---|---|---|
| 1 | $0.00003 | $0.00018 | $0.000075 |
| 10 | $0.0003 | $0.0018 | $0.00075 |
| 100 | $0.003 | $0.018 | $0.0075 |
| 200 | $0.006 | $0.036 | $0.015 |
| 300 | $0.009 | $0.054 | $0.0225 |
| 400 | $0.012 | $0.072 | $0.03 |
| 500 | $0.015 | $0.09 | $0.0375 |
| 1,000 | $0.03 | $0.18 | $0.075 |
| 2,000 | $0.06 | $0.36 | $0.15 |
| 5,000 | $0.15 | $0.9 | $0.375 |
| 10,000 | $0.3 | $1.80 | $0.75 |
| 25,000 | $0.75 | $4.50 | $1.875 |
| 50,000 | $1.50 | $9.00 | $3.75 |
| 100,000 | $3.00 | $18.00 | $7.50 |
| 250,000 | $7.50 | $45.00 | $18.75 |
| 500,000 | $15.00 | $90.00 | $37.50 |
| 1,000,000 | $30.00 | $180.00 | $75.00 |
| 5,000,000 | $150.00 | $900.00 | $375.00 |
| 10,000,000 | $300.00 | $1,800.00 | $750.00 |
| 50,000,000 | $1,500.00 | $9,000.00 | $3,750.00 |
| 100,000,000 | $3,000.00 | $18,000.00 | $7,500.00 |
| 500,000,000 | $15,000.00 | $90,000.00 | $37,500.00 |
| 1,000,000,000 | $30,000.00 | $180,000.00 | $75,000.00 |
| 10,000,000,000 | $300,000.00 | $1,800,000.00 | $750,000.00 |
| 100,000,000,000 | $3,000,000.00 | $18,000,000.00 | $7,500,000.00 |
Tokens for a fixed budget
Tokens GPT-5.5 Pro can process for a set budget — send-only, reply-only, and a 70/30 mix.
| Budget | Input tokens | Output tokens | Mixed tokens (70/30) |
|---|---|---|---|
| $0.01 | 333 | 55.6 | 133 |
| $0.1 | 3,333 | 556 | 1,333 |
| $0.5 | 16,667 | 2,778 | 6,667 |
| $1.00 | 33,333 | 5,556 | 13,333 |
| $5.00 | 166,667 | 27,778 | 66,667 |
| $10.00 | 333,333 | 55,556 | 133,333 |
| $20.00 | 666,667 | 111,111 | 266,667 |
| $25.00 | 833,333 | 138,889 | 333,333 |
| $30.00 | 1M | 166,667 | 400,000 |
| $50.00 | 1.67M | 277,778 | 666,667 |
| $100.00 | 3.33M | 555,556 | 1.33M |
| $250.00 | 8.33M | 1.39M | 3.33M |
| $500.00 | 16.7M | 2.78M | 6.67M |
| $1,000.00 | 33.3M | 5.56M | 13.3M |
| $5,000.00 | 166.7M | 27.8M | 66.7M |
| $10,000.00 | 333.3M | 55.6M | 133.3M |
At these rates
- A workload with 70% input and 30% output costs $75.00 per 1 million total tokens and $7,500.00 per 100 million.
- At the same token count, output costs 6 times the input rate. Response length therefore deserves its own budget limit.
- Filling the 1,000,000-token context window with input alone would cost about $30.00, before any output.
These figures use public list prices. Cache eligibility, batch or priority modes, long-context surcharges, discounts, and regional billing can change the invoice.