ModelPricing.aiGPT-5.6 Luna API Pricing
GPT-5.6 Luna costs $0.200 per million input tokens and $1.20 per million output tokens on the OpenAI API. Prices are tracked from the official OpenAI pricing table and used by the ModelPricing.ai estimation API, so this page and the API always quote the same numbers. See all OpenAI model pricing or the full LLM pricing comparison.
GPT-5.6 Luna Pricing Per Million Tokens
| Tier | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M |
|---|---|---|---|---|
| Up to 272K input tokens | $0.200 | $1.20 | $0.020 | $0.250 |
| Above 272K input tokens | $0.400 | $1.80 | $0.040 | $0.500 |
What GPT-5.6 Luna Costs In Practice
Monthly cost at three representative workloads, using the standard text rate in effect today.
| Workload | Monthly cost |
|---|---|
| Light — 1M in / 200K out | $0.4400 |
| Moderate — 10M in / 2M out | $4.40 |
| Heavy — 100M in / 20M out | $44.00 |
Need your own numbers? Use the LLM cost calculator or call the estimation API directly.
Compare GPT-5.6 Luna With Other Models
Looking for something cheaper from OpenAI? GPT-5 Nano is the lowest-priced option on input tokens.
GPT-5.6 Luna Pricing FAQ
How much does GPT-5.6 Luna cost per token?
GPT-5.6 Luna costs $0.200 per million input tokens and $1.20 per million output tokens on the OpenAI API. That works out to $0.0002 per thousand input tokens.
How much does it cost to run GPT-5.6 Luna per month?
At 1M in / 200K out per month, GPT-5.6 Luna costs about $0.4400. A heavier workload of 100M input and 20M output tokens costs about $44.00.
Does GPT-5.6 Luna charge more for long context?
Yes. GPT-5.6 Luna uses breakpoint pricing: requests above 272K input tokens move to a higher rate of $0.400 per million input tokens, up from $0.200 below the threshold.
Does GPT-5.6 Luna support prompt caching?
Yes. Cached input tokens are billed at $0.020 per million on GPT-5.6 Luna, compared with $0.200 per million for uncached input.
Estimate GPT-5.6 Luna costs programmatically
POST a token count to /v1/estimate with model gpt-5.6-luna and get a priced breakdown back, promotions
already applied.