GPT-6 Luna Pro
OpenAI· released 22 Sept 2026
openai/gpt-6-luna-pro- Input / 1M tokens
- $0.1
- Output / 1M tokens
- $0.5
Longest answer: 128K tokens
About
GPT-6 Luna Pro is OpenAI’s GPT-6 Luna model served with reasoning.mode set to pro, intended to provide higher-quality responses on complex tasks. The summary notes that pro mode spends far more, but does not complete the cost comparison. The listed token prices are $0.1 per 1M input tokens and $0.5 per 1M output tokens. It accepts text, image, and file inputs and produces text. Vision, reasoning, and tool support are listed. The context window is 1,050,000 tokens, and the maximum output is 128,000 tokens. Its model identifier is openai/gpt-6-luna-pro. It was released on September 22, 2026. For teams evaluating it, the pro-mode setting and supported modalities describe how it differs in serving from the underlying GPT-6 Luna model, while the context and output limits define its listed capacity.
Who it is for
GPT-6 Luna Pro suits teams handling complex tasks that want pro-mode reasoning. Its file, image, and text inputs may fit workflows combining those materials with a large context window.
What is good
- Context window is 1,050,000 tokens.
- Accepts text, image, and file inputs.
- Supports reasoning and tools.
- Maximum output is 128,000 tokens.
What to know first
- Pro mode is described as spending far more.
- Output costs $0.5 per 1M tokens.
Verdict
GPT-6 Luna Pro pairs a pro-mode setting with a large context window and text, image, and file input. Consider the stated higher spending in pro mode alongside the listed per-token prices.
Details
- Lab
- OpenAIopenrouter.ai · 3 Oct 2026
- Context
- 1,050Kopenrouter.ai · 3 Oct 2026
- Input price
- $0.1 / 1Mopenrouter.ai · 3 Oct 2026
- Output price
- $0.5 / 1Mopenrouter.ai · 3 Oct 2026
- Max output
- 128,000 tokensopenrouter.ai · 3 Oct 2026
- Inputs
- file, image, textopenrouter.ai · 3 Oct 2026
- Open weights
- Noopenrouter.ai · 3 Oct 2026
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Sources
- openrouter.ai/openai/gpt-6-luna-pro· checked 3 Oct 2026