GPT-5.6 Luna API pricing
The small, low-cost tier of the GPT-5.6 family.
Input
$0.20
per 1M tokens
Cached input
$0.02
per 1M tokens
Cache write
$0.25
per 1M tokens
Output
$1.20
per 1M tokens
Context window
1M
max output 125K
Prices last synced Aug 20, 2026 from the LiteLLM community price catalog — the same catalog Marginal prices real usage events against, refreshed daily. Hand-checked against the provider's official pricing page on Aug 20, 2026. Spot an error? Tell us.
Pricing notes
- Cache writes bill at $0.25/1M (1.25x input). Long-context (input over ~272K tokens): the whole request bills $0.40 input / $0.04 cached / $1.80 output per 1M.
- Batch and Flex tiers are 50% off these rates; Fast mode is roughly 2x (varies by model).
What would GPT-5.6 Luna cost you?
Enter your workload — add other models to compare the same traffic across providers.
Your monthly workload
Cache hit rate = share of input tokens served from the provider's prompt cache, billed at the model's cached-input price. Estimates use standard per-token rates — batch discounts, service tiers, and long-context surcharges are not applied.
| Model | Input | Cached input | Output | Per request | Monthly |
|---|---|---|---|---|---|
| GPT-5.6 Luna | $120 | $8.00 | $300 | $0.00086 | $428 |
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