Replit Shifts Default AI Provider From Anthropic to OpenAI Amid Cost and Performance Dispute

Replit is ending its working relationship with Anthropic and moving OpenAI into the platform’s default model position, CEO and co-founder Amjad Masad said at TechCrunch Disrupt. Anthropic’s Claude models will remain available to Replit customers, making the decision a provider shift rather than an immediate removal of Claude from the product.

Masad cited cost among the reasons for the change and, in a separate account of his comments, also pointed to partnership considerations and performance. Replit announced an OpenAI partnership in August, but the company had not publicly indicated that the arrangement with Anthropic was ending. TechCrunch and Tech in Asia both described the change as a decision disclosed by Masad onstage.

The switch gives OpenAI a larger role inside a coding platform used by startup founders and developers, while putting model economics at the center of AI software strategy. Replit’s decision reflects how model providers compete on more than benchmark scores: API pricing, commercial terms, reliability, product integration, and access to a partner’s user base all shape which system becomes the default.

OpenAI’s agreement with Replit was announced in August alongside the platform’s broader product push, including a free mode. Masad’s comments indicate that the partnership has since advanced from a commercial collaboration to the main route for model access. TechBuzz framed the move as a cost-driven replacement, while Dealroom also linked the change to cost pressures.

Replit customers can still use Claude, according to the company’s stated plan. That distinction matters for developers who have built workflows around Anthropic models, since a change in default behavior does not automatically erase model choice, existing preferences, or compatibility with projects already running on the platform.

The arrangement also leaves room for users to compare OpenAI and Anthropic models inside Replit. Such access can soften the immediate disruption while still directing new or less experienced users toward OpenAI through defaults, recommendations, and product integration. The Threads account repeated Masad’s comments but also described internal disagreement over whether the partnership remains active, creating uncertainty around the exact status of the commercial relationship.

The public account is not fully settled. Masad said the relationship had ended, yet a social-media account claimed that people at Replit contradicted him and said the partnership remained active. Superpower Daily’s headline likewise characterized the claim as disputed, although the supplied excerpt contains no detailed evidence resolving the disagreement.

That conflict makes the practical meaning of “no longer working with Anthropic” unclear. It could refer to a change in primary provider status, a reduction in a commercial arrangement, or a broader termination that still leaves Claude accessible through existing channels. The clearest confirmed product detail is that OpenAI will replace Anthropic as Replit’s default provider while Claude remains available.

The provider change arrives as competition around AI-assisted and “vibe” coding intensifies. Replit is positioning itself as a place where users can create software through natural-language instructions and integrated development tools, while Google is also pursuing the market through a partnership with Replit, according to CNBC.

That broader push raises the stakes of model selection. A stronger default can affect generated code, debugging, agent behavior, latency, and the cost of serving each project. OpenAI gains distribution among builders, Anthropic retains a presence through Claude access, and Replit gets a chance to align its economics with the provider it has selected for new usage.

Developers should watch Replit’s pricing, model defaults, usage limits, and documentation for evidence of how deeply the transition is being implemented. The continued availability of Claude gives users an immediate fallback, but default placement can shape which model receives the most traffic and which workflows Replit optimizes first.

The next important signal will be a formal statement from Replit clarifying whether Anthropic’s partnership is terminated, reduced, or still active under a different arrangement. Until then, the business direction is clear but the contractual status remains contested: Replit is prioritizing OpenAI while preserving Claude access.