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OpenAI unveils GPT-5.6 Luna with 25x lower cost and improved reasoning over GPT-5.5

OpenAI unveils GPT-5.6 Luna with 25x lower cost and improved reasoning over GPT-5.5
OpenAI launches GPT-5.6 Luna

OpenAI has announced GPT-5.6 Luna, a significant upgrade within its health intelligence offering. The company states that GPT-5.6 Luna delivers stronger performance at a fraction of the cost—specifically, it outperforms GPT-5.5 at its highest reasoning setting while costing 25 times less.

This improvement aims to raise both quality and affordability across the entire lineup, positioning OpenAI to deliver more advanced health intelligence services at greater scale. The release is expected to accelerate adoption of AI-driven solutions in the health sector.

OpenAI recently launched GPT-5.6 with expanded real-time design review features, enabling stronger design judgment and refinement capabilities across user workflows, according to a prior company update. The firm has also broadened its internal use of agentic tools and Codex, enhancing support for complex projects with automated AI tools, as detailed in a separate report. These developments reflect OpenAI's ongoing focus on operational improvement and integration of advanced technologies.

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