OpenAI / openai/gpt-6-luna
GPT-6 Luna - access through LLMTR
GPT-6 Luna is the GPT-6 model optimized for fast responses and high volume, suited to cost-sensitive work such as assistants, classification, summarization, extraction, and routing. It supports a 1.05M context window, 128K max output, text and image input, prompt caching, and six reasoning effort levels from none through max.
Technical specifications
| Canonical ID | openai/gpt-6-luna |
|---|---|
| Provider | OpenAI |
| Context window | 1,050,000 tokens |
| Operations | RESPONSES |
| Modalities | text, image |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| RESPONSES | INPUT_TEXT | PER_1M_TOKENS | $0.100000 |
| RESPONSES | CACHE_READ | PER_1M_TOKENS | $0.010000 |
| RESPONSES | OUTPUT_TEXT | PER_1M_TOKENS | $0.500000 |
| RESPONSES | CACHE_WRITE | PER_1M_TOKENS | $0.125000 |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions -H "Authorization: Bearer llmtr-your_key" -H "Content-Type: application/json" -d '{"model":"openai/gpt-6-luna","messages":[{"role":"user","content":"Hello"}]}'Guides about this model
- Nanbeige4.2 3B vs GPT-5 nano: choosing a small model - Both models are called on LLMTR through /v1/chat/completions with the same API key. Nanbeige4.2 3B is hosted in Turkey and costs $1.00 input and $3.00 output per 1M tokens. GPT-5 nano costs $0.05 input and $0.40 output, reads images and does not carry LLMTR's Turkey hosting mark. OpenAI shuts GPT-5 nano down on 11 December 2026; after that date GPT-6 Luna can be used on LLMTR.
- MiniMax M3.1 Flash vs Haiku 5.5, GPT-6 Luna, Gemini 3.8 Flash - On LLMTR all four models are called with the same API key on /v1/chat/completions. For prompts up to 100,000 tokens Claude Haiku 5.5 and GPT-6 Luna cost less; once a prompt passes 272,000 tokens MiniMax M3.1 Flash moves ahead, because its price does not change up to 1,000,000 tokens. Video input is on MiniMax M3.1 Flash and Gemini 3.8 Flash.
- Mercury 3 vs Claude Haiku 5.5, GPT-6 Luna, Gemini 3.8 Flash - On LLMTR all four models are called with the same API key on /v1/chat/completions. Mercury 3 accepts text only; at its introductory price through 2 November 2026 it matches Haiku 5.5 and GPT-6 Luna on input and is below them on output, and from 3 November Haiku and Luna cost less on short prompts. For images, PDF, audio and video the other three models come first.
Related models
- GPT-6 Astra openai/gpt-6-astra
- GPT-6.1 Sol openai/gpt-6.1-sol
- GPT-6.1 Terra openai/gpt-6.1-terra
- GPT-6 Sol openai/gpt-6-sol
- GPT-5.6 Sol openai/gpt-5.6-sol
- GPT-5.6 Sol Pro openai/gpt-5.6-sol-pro
- GPT-5.6 Terra openai/gpt-5.6-terra
- GPT-5.6 Terra Pro openai/gpt-5.6-terra-pro