GPT 6 Luna

Default
GPT-6 Luna is a GPT-6 family reasoning model for complex coding, research, and multi-step analysis.
GPT-6 Luna is a GPT-6 family reasoning model for complex coding, research, and multi-step analysis.

GPT 6 Luna is an AI model from OpenAI, available on ZeroTwo. It costs $0.10 per million input tokens and $0.50 per million output tokens, has a 1,050,000-token context window, can return up to 128,000 output tokens, and has a knowledge cutoff of May 18, 2026.

Intelligence
Fair
Speed
Very Fast
Price
$0.10 • $0.50
Input • Output
Input
Text, Image
Output
Text

GPT-6 Luna is a GPT-6 family reasoning model for complex coding, research, and multi-step analysis.

1,050,000 context window
128,000 max output tokens
May 18, 2026 knowledge cutoff
Reasoning token support
Pricing
Pricing is based on the number of tokens used. For tool-specific models, like search and computer use, there's a fee per tool call. See details in the pricing page.

Requests above 272,000 input tokens move the whole request to long-context rates: $0.20 input, $0.02 cached input, and $0.75 output per million tokens.

Text tokens
Per 1M tokens
∙
Batch API price
Input
$0.10
Cached input
$0.01
Output
$0.50
Quick comparison
Input
Cached input
Output
GPT 6 Luna
$0.10
Modalities
Text
Input and output
Image
Input only
Audio
Not supported
Endpoints
Chat Completions
v1/chat/completions
Responses
v1/responses
Batch
v1/batch
Realtime
v1/realtime
Assistants
v1/assistants
Fine-tuning
v1/fine-tuning
Embeddings
v1/embeddings
Image Generation
v1/images/generations
Image Edit
v1/images/edits
Speech Generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/translations
Moderation
v1/moderations
Completions (legacy)
v1/completions
Features
Streaming
Supported
Function calling
Supported
Structured outputs
Supported
Fine-tuning
Not supported
Distillation
Not supported
Fast response
Not supported
Cost efficient
Not supported
Tools
Tools supported by this model when using the Responses API.
Web search
Not supported
Code interpreter
Not supported
File search
Not supported
Image generation
Not supported
MCP
Not supported
Snapshots
Snapshots let you lock in a specific version of the model so that performance and behavior remain consistent. Below is a list of all available snapshots and aliases for GPT 6 Luna.
gpt-6-luna

Questions

How much does GPT 6 Luna cost?

GPT 6 Luna is priced at $0.10 per million input tokens and $0.50 per million output tokens, with cached input at $0.01 per million. On ZeroTwo it is included in your plan's credits rather than billed per token.

What is GPT 6 Luna's context window?

GPT 6 Luna accepts up to 1,050,000 tokens of context and can return up to 128,000 output tokens.

What is GPT 6 Luna's knowledge cutoff date?

GPT 6 Luna has a training knowledge cutoff of May 18, 2026. For anything later than that, use a model with web search enabled.

Can I use GPT 6 Luna for free?

You can try GPT 6 Luna on ZeroTwo's free plan, which includes a monthly credit allowance across every model in the catalogue. Heavier use moves to a paid plan rather than a per-token bill.