OpenAI: GPT-6 Luna

GPT-6 Luna is an OpenAI model that accepts text, image, and file inputs. Its context window is 1,050,000 tokens, and a single response can run up to 128,000 tokens, so long documents or large sets of material can fit in one request. It supports tool calling and reasoning. Structured output support and open-weight availability are not listed, so confirm both before building around them. Pricing is $0.10 per million input tokens and $0.50 per million output tokens. Because input costs a fifth of output, the model suits input-heavy work such as reviewing long files or images and returning shorter answers. Teams running high request volumes with tool use should consider shortlisting it. It has no independent benchmark coverage yet, so its quality relative to other models is unproven. Test it on your own tasks before moving production traffic to it.