Replit, the AI coding platform that has become a favorite of startup founders and developers, is no longer working with Anthropic, the company’s CEO and co-founder Amjad Masad said Thursday while onstage at TechCrunch Disrupt. Masad said the decision was made for a number of different reasons, including cost. Replit announced a partnership with OpenAI in August, but there was never any indication that it was no longer partnering with Anthropic.
It was a decision based on both cost, partnership, and performance. And for all these reasons, we just felt like they were a better partner for now.” It seems, however, that Anthropic hasn’t been completely cut out of Replit, which sells a cloud-based software development platform where users can develop and deploy apps directly from inside their browser. After Disrupt, Masad clarified that customers can still access Anthropic models on the platform, but that OpenAI’s ChatGPT is now the default.
This shift could significantly reduce Replit’s spend with Anthropic since most customers stick with the default rather than selecting a model themselves. Prior to striking a deal with OpenAI, Replit relied on Anthropic’s Claude models to run its platform. That partnership was said to have helped the company grow its revenue significantly, and Masad noted on stage that Replit had been, until recently, a top-five customer of Anthropic’s.
One person familiar, who asked not to be named, said the partnership was still in place. There is evidence on the company’s website, blog posts, and social media posts that Replit was promoting Anthropic products as recently as a few weeks ago. For instance, a blog post in late September cites Anthropic’s Claude Fable 5 and Claude Fable 5.1 as models running in Replit Agent’s production environment.
Around the same time, one of Replit’s product employees posted on X about using Anthropic’s flagship model Opus 5.5 and promoting its capabilities. Masad also shared insights about the company’s growth while onstage at Disrupt, noting that enterprise is starting to provide a larger slice of revenue. Masad also commented on the necessity for good AI safety measures.
And once you figure all of that out, then you can deploy AI safely.” This article was originally published on October 16 at 2:22 pm PT. It has been updated to include more context around Replit’s partnerships with Anthropic and OpenAI.
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