GPT-6 Luna Pro
openai/gpt-6-luna-proGPT-6 Luna Pro is the same underlying model as [GPT-6 Luna](https://openrouter.ai/openai/gpt-6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
$0.10Input, per million tokens
$0.50Output, per million tokens
1.05MContext window
128KLongest answer
1.05M tokens of context — about 787,500 words, on a scale that ends at 2M.
What it can do
- Reasoning
- Vision
- Tool use
- Takes file
- Takes image
- Takes text
- Gives text
Released 22 Sept 2026 · checked 3 Oct 2026.
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