Replit is transitioning its primary AI integration to OpenAI, moving away from Anthropic as its default model provider for the platform’s development environment. CEO Amjad Masad confirmed the shift during an onstage appearance on October 15, 2026, citing cost efficiency, partnership quality, and technical performance as the driving factors behind the change.
OpenAI’s Sol and Astra models will now serve as the default engines for Replit’s coding tools, including the Replit Agent. According to Masad, these models outperformed Anthropic’s Claude on “VBench,” Replit’s internal benchmarking suite designed to measure the efficacy of AI models in real-world software engineering tasks.
The decision marks a significant pivot for the coding platform, which had previously leaned heavily on Anthropic’s ecosystem. In his remarks, Masad stated that Replit is “no longer working with Anthropic,” framing the move as a clean break. However, the technical reality of the transition appears more nuanced than the CEO’s public declaration suggests.
Despite the announcement of a total shift, Replit’s internal production records from as recently as late September 2026 documented the active use of Anthropic’s Claude Fable 5 and 5.1 models. This technical overlap suggests a gradual phasing out rather than an immediate or total severance of access, particularly as enterprise customers often require stability in the models powering their development pipelines.
Financial considerations appear to have played a central role in the provider swap. Replit’s business model has shifted significantly over the last year, with B2B revenue now accounting for more than 50% of the company’s total earnings. As the company scales its enterprise offerings, the high token costs associated with agentic workflows—which often require multiple iterative calls to a large language model—have made cost-efficiency a primary metric for model selection.
The move to OpenAI’s Sol and Astra models is expected to provide Replit with better margins as it expands its “agentic coding” capabilities. While Masad’s comments indicate a definitive end to the Anthropic partnership, the developer community continues to monitor whether Claude will remain available as a secondary option for manual selection, or if OpenAI will become the exclusive provider for the platform’s millions of users.
