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GPT-5.6 Luna Pricing — Token Costs & API Calculator

Official API pricing for GPT-5.6 Luna by OpenAI, with context window, tokenizer details, and a plain-English cost estimate.

Pricing Details

AttributeValue
ProviderOpenAI
Input cost (per 1M tokens)$1.00
Output cost (per 1M tokens)$6.00
Long-context rate (prompts over 272K tokens)$2.00 input / $9.00 output per 1M
Context cachingYes — 90% off input tokens
Batch API discount50% off
Context window1.1M tokens
Tokenizero200k_base (GPT-4o / o-series)
Thinking / reasoningYes — billed as additional output tokens (est. 3× multiplier)

Cost example

1,000 requests × 500 input tokens × 200 output tokens costs $1.70/month with GPT-5.6 Luna at OpenAI's published rates.

Based on $1/1M input tokens and $6/1M output tokens.

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Pricing last verified OpenAI pricing page

prices.jsondata is human-verified and updated automatically by CI.