CEO Amjad Masad cites cost, performance, and partnership as the reasons behind the switch, with ChatGPT now the default.

Replit will make OpenAI’s ChatGPT its default model and has ended its reliance on Anthropic’s Claude to power Replit Agent. CEO Amjad Masad said onstage at TechCrunch Disrupt that cost, performance, and the strength of the partnership drove the decision.

Replit built its platform on Anthropic’s Claude models before announcing an OpenAI partnership in August. Masad said Replit had ranked among Anthropic’s top five customers, and the company still lets users pick Claude or other supported models inside the product.

Default settings carry outsized weight in developer tools, because most customers never change them. Replit’s shift therefore moves a large share of inference traffic to OpenAI and trims the revenue Anthropic draws from one of its larger accounts.

People familiar with the Anthropic relationship dispute Masad’s account and say the partnership still stands, while Replit blog posts from late September still list Claude models in production. Enterprise now accounts for roughly 15% of Replit revenue, up from about 2% last year.

What matters

• Replit’s CEO said the company no longer partners with Anthropic and now defaults to OpenAI models.
• Most users keep the default model, so the switch sharply cuts Replit’s spend with Anthropic.
• Anthropic insiders dispute the split and say the partnership remains in place, so watch the contract terms.

Why it matters

Anthropic insiders dispute the split and say the partnership remains in place, so watch the contract terms.

This GenAI News article was prepared in original wording using reporting and materials published by TechCrunch AI. Source reference: https://techcrunch.com/2026/10/17/replit-is-no-longer-working-with-anthropic-ceo-says/.

Drafted by the GenAI News review pipeline.