OpenAI · API pricing

GPT-6 Luna API pricing

GPT-6 Luna costs $0.10 per million input tokens and $0.50 per million output tokens on OpenAI's standard tier, and cached input is $0.010. Checked against the official pricing page on October 12, 2026.

Input / 1M$0.10
Cached input / 1M$0.010
Output / 1M$0.50
Context window1.05M

Short-context rate.

What GPT-6 Luna costs for common workloads

WorkloadMonthly costRank of 20
Support chatbot
60,000 requests · 1,500 in / 300 out
$18.00#1
Document summaries
20,000 requests · 6,000 in / 400 out
$16.00#1
Coding assistant
30,000 requests · 4,000 in / 800 out
$24.00#1
RAG search
100,000 requests · 2,500 in / 250 out
$37.50#1

Price it for your own workload

Compared against similar models from other providers.

Start from a use case

1,000 tokens is about 750 English words. Input includes your system prompt, chat history and any retrieved documents.

Claude Haiku 5.5
AnthropicCheapest
$18.00 /mo
GPT-6 Luna
OpenAICheapest
$18.00 /mo
DeepSeek V4.1 Flash
DeepSeek
$24.30 /mo
Gemini 3.1 Flash-Lite
Google
$49.50 /mo
Gemini 3.5 Flash-Lite
Google
$72.00 /mo
Claude Haiku 4.5
Anthropic
$180 /mo

Compare GPT-6 Luna