OpenAI

GPT-6 Luna

GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, positioned below GPT-6 Sol. It is suited for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic...

gpt-6-luna

Pricing

~96%

Input: $0.003831 / 1,000,000 tokens
Output: $0.019153 / 1,000,000 tokens
Cache read: $0.000383 / 1,000,000 tokens
Cache write: $0.004788 / 1,000,000 tokens

How pricing works

Discount history

96.2%Nov 8, 03:56 AM UTC

Nov 7, 11:57 PMNov 8, 03:56 AM UTC

Model details

Input: file, image, text
Output: text
Context window: 1,050,000 tokens
Maximum output: 128,000 tokens
Availability: $2.1KUncapped capacity
Updated: 11/8/2026, 3:58:06 AM UTC

Capacity is reserved when your request is accepted.

Capabilities

ChatStreamingWeb searchVisionTool callingReasoningJSON mode

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools