OpenAI · Budget
GPT-5.6 Luna API pricing
$0.20 / 1M input tokens · $1.20 / 1M output tokens
📊Cheaper than 22 of the other 24 models we track, pricier than 2 — rank 3 of 25 by input price.
Within the budget tier (11 models we track), the average input rate is $0.41/1M — GPT-5.6 Luna runs about 51% below that average.
Output tokens cost 6.0x the input rate for GPT-5.6 Luna — above the 4.6x average across all tracked models.
Provider
OpenAI
Tier
Budget
Input /1M tokens
$0.20
Output /1M tokens
$1.20
Context window
~1.05M tokens
Verified
September 10, 2026