Providers / OpenAI / GPT-6 Luna
GPT-6 Luna API Cost Calculator
GPT-6 Luna costs $0.1 per 1M input tokens and $0.5 per 1M output tokens at official OpenAI API prices, verified 2026-10-24. Estimate your own usage below — the calculator is preset to this model.
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Cost per call
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Estimated monthly cost
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GPT-6 Luna price facts
| Input | $0.1 per 1M tokens |
|---|---|
| Output | $0.5 per 1M tokens |
| Cached input | $0.01 per 1M tokens |
| Batch tier | Not published |
| Context window | 1,050,000 tokens |
| Released | 2026-09-22 |
| Price verified | 2026-10-24 · source |
What GPT-6 Luna costs in practice
| Workload | Per call | Per month |
|---|---|---|
| Chat assistant 2,000 input / 500 output tokens per call, 10,000 calls a month | $0.00045 | $4.50 |
| Document processing 50,000 input / 2,000 output tokens per call, 1,000 calls a month | $0.006 | $6.00 |
| Agent loop with prompt caching 10,000 fresh input / 100,000 cached input / 2,000 output tokens per call, 500 calls a month | $0.003 | $1.50 |
Frequently asked questions
How much does GPT-6 Luna cost per month?
It depends entirely on token volume. As worked examples: a chat assistant doing 10,000 calls a month costs $4.50, while a document pipeline doing 1,000 long calls costs $6.00. Use the calculator above with your own numbers for an exact figure.
Is GPT-6 Luna cheaper than GPT-6.1 Sol?
At a blended workload of 1M input and 250K output tokens, GPT-6 Luna costs $0.225 and GPT-6.1 Sol costs $4.50 — so GPT-6 Luna is the cheaper of the two at this mix. The answer can flip if your workload is mostly output or mostly cached input, which is exactly what the calculator is for.
Does GPT-6 Luna have batch or caching discounts?
No published batch rate in our sources. Cached input is billed at $0.01 per 1M tokens.Prices verified 2026-10-24.