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    External (via citation)Friday, August 21, 2026 3 min read
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    Exclusive: Replit taps OpenAI's low-cost Luna model for new 'Free Mode'

    Replit launched Free Mode, a new feature powered by OpenAI's GPT-5.6 Luna model, available to Core ($20/month) and Pro ($100/month) subscribers as the default experience. The partnership was enabled by OpenAI cutting Luna API costs by 80…

    Replit launched Free Mode, a new feature powered by OpenAI's GPT-5.6 Luna model, available to Core ($20/month) and Pro ($100/month) subscribers as the default experience. The partnership was enabled by OpenAI cutting Luna API costs by 80% on July 30, driven by operational efficiencies rather than new compute capacity. Free Mode provides unlimited low-cost AI usage for routine tasks, with the Replit agent automatically routing to more capable models when complexity demands it and reverting to Luna afterward. The two companies signaled this is the first of multiple planned joint launches. The move reflects a broader industry push to improve ROI on AI spend as enterprise customers grow skeptical and competition from cheaper Chinese models intensifies.

    Key takeaways
    • 01Replit launched Free Mode, a new feature powered by OpenAI's GPT-5.6 Luna model, available to Core ($20/month) and Pro ($100/month) subscribers as the default experience.
    • 02The partnership was enabled by OpenAI cutting Luna API costs by 80% on July 30, driven by operational efficiencies rather than new compute capacity.
    • 03Free Mode provides unlimited low-cost AI usage for routine tasks, with the Replit agent automatically routing to more capable models when complexity demands it and reverting to Luna afterward.
    • 04The two companies signaled this is the first of multiple planned joint launches.

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