GPT-6 Luna

Abstract visualization of OpenAI's Decisions API routing structured choices at high speed

OpenAI Opens Its Decisions API to Everyone, Chasing the Fast Cheap Decision Model Race

OpenAI just picked a fight with a $7.6 billion startup by copying its best trick. On Thursday, the company opened its Decisions API to all customers, a new endpoint that doesn’t write paragraphs or hold conversations. It makes split-second structured calls: is this product photo damaged, should this ticket get escalated, which option should the agent pick next. The price starts at $0.10 per million input tokens, with output free. ...

The AI Price War: Claude Opus 5.5 vs GPT-6 Sol and Luna

On September 22, Anthropic launched Claude Opus 5.5 at roughly 40% lower cost than Opus 5, and about 90 minutes later OpenAI answered with GPT-6 Sol and Luna at half of last generation’s prices. Full breakdown in the slides above. Sources: Simon Willison (simonwillison.net), AI Explainer India, Intelligibberish, AI Briefing Room citing Reuters — September 22–26, 2026.