OpenAI
GPT-5.6 Luna token cost
Lower-cost GPT-5.6 variant for high-throughput chat and light agents.
Published list rates
Input
$0.2
per 1M tokens
Output
$1.20
per 1M tokens
Cached input
$0.02
per 1M tokens
Context window
400,000
tokens
Pricing source: OpenAI API pricing
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Project monthly volume
Daily requests × tokens per request × 30 days.
Estimated cost
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Cost as volume grows
What GPT-5.6 Luna 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 | $0.0000002 | $0.000001 | $0.0000005 |
| 10 | $0.000002 | $0.000012 | $0.000005 |
| 100 | $0.00002 | $0.00012 | $0.00005 |
| 200 | $0.00004 | $0.00024 | $0.0001 |
| 300 | $0.00006 | $0.00036 | $0.00015 |
| 400 | $0.00008 | $0.00048 | $0.0002 |
| 500 | $0.0001 | $0.0006 | $0.00025 |
| 1,000 | $0.0002 | $0.0012 | $0.0005 |
| 2,000 | $0.0004 | $0.0024 | $0.001 |
| 5,000 | $0.001 | $0.006 | $0.0025 |
| 10,000 | $0.002 | $0.012 | $0.005 |
| 25,000 | $0.005 | $0.03 | $0.0125 |
| 50,000 | $0.01 | $0.06 | $0.025 |
| 100,000 | $0.02 | $0.12 | $0.05 |
| 250,000 | $0.05 | $0.3 | $0.125 |
| 500,000 | $0.1 | $0.6 | $0.25 |
| 1,000,000 | $0.2 | $1.20 | $0.5 |
| 5,000,000 | $1.00 | $6.00 | $2.50 |
| 10,000,000 | $2.00 | $12.00 | $5.00 |
| 50,000,000 | $10.00 | $60.00 | $25.00 |
| 100,000,000 | $20.00 | $120.00 | $50.00 |
| 500,000,000 | $100.00 | $600.00 | $250.00 |
| 1,000,000,000 | $200.00 | $1,200.00 | $500.00 |
| 10,000,000,000 | $2,000.00 | $12,000.00 | $5,000.00 |
| 100,000,000,000 | $20,000.00 | $120,000.00 | $50,000.00 |
Tokens for a fixed budget
If you cap spend, this is roughly how many GPT-5.6 Luna tokens that money buys.
| Budget | Input tokens | Output tokens | Mixed tokens (70/30) |
|---|---|---|---|
| $0.01 | 50,000 | 8,333 | 20,000 |
| $0.1 | 500,000 | 83,333 | 200,000 |
| $0.5 | 2.5M | 416,667 | 1M |
| $1.00 | 5M | 833,333 | 2M |
| $5.00 | 25M | 4.17M | 10M |
| $10.00 | 50M | 8.33M | 20M |
| $20.00 | 100M | 16.7M | 40M |
| $25.00 | 125M | 20.8M | 50M |
| $30.00 | 150M | 25M | 60M |
| $50.00 | 250M | 41.7M | 100M |
| $100.00 | 500M | 83.3M | 200M |
| $250.00 | 1.25B | 208.3M | 500M |
| $500.00 | 2.5B | 416.7M | 1B |
| $1,000.00 | 5B | 833.3M | 2B |
| $5,000.00 | 25B | 4.17B | 10B |
| $10,000.00 | 50B | 8.33B | 20B |
At these rates
- A workload with 70% input and 30% output costs $0.5 per 1 million total tokens and $50.00 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 400,000-token context window with input alone would cost about $0.08, before any output.
- Cached input is $0.02 per million, 90% below standard input when the workload meets the provider’s cache rules.
These figures use public list prices. Cache eligibility, batch or priority modes, long-context surcharges, discounts, and regional billing can change the invoice.