Replit CEO Says Anthropic Partnership Ended, but Evidence Conflicts
Replit CEO Amjad Masad says the AI coding platform left Anthropic for OpenAI on cost and performance, but insiders and recent product evidence conflict.
Summary
On October 16, 2026, Replit CEO and co-founder Amjad Masad said the cloud-based browser platform, where users build and deploy apps, was no longer working with Anthropic. Replit had used Claude to run its platform, a partnership credited with significant revenue growth, but announced an OpenAI partnership in August without disclosing an Anthropic split. Masad said ChatGPT is now better and cited cost, partnership quality, performance, and Replit’s internal and public benchmarks, where Sol and Astra consistently outperform at building vibe-coded applications from scratch.
People familiar with the Anthropic relationship rejected Masad’s account, with one saying the partnership remains active. Replit materials from late September named Claude Fable 5 and Claude Fable 5.1 in Replit Agent’s production environment, while an employee promoted Anthropic’s flagship Opus 5.5 on X. Replit has not clarified the contradiction. Masad also said enterprise contracts rose from 2% of revenue last year to about 15% this year, B2B now exceeds 50%, and ARR remains undisclosed. He said safely deploying AI agents requires orchestration, error recovery, security, sandboxing, networking, identity, and authorization.
Positives
- Enterprise contracts increased from 2% of Replit’s revenue last year to about 15% this year.
- B2B customers now generate more than 50% of Replit’s revenue.
- Sol and Astra consistently lead Replit’s benchmarks for building vibe-coded applications from scratch.
- OpenAI partnered with Replit in August, giving the coding platform another major AI supplier.
- Replit is prioritizing orchestration, recovery, sandboxing, security, networking, identity, and authorization for safer AI agents.
Risks & concerns
- One person familiar with the Anthropic relationship says it remains active, directly contradicting Amjad Masad’s claim.
- Late September materials listed Claude Fable 5 and Claude Fable 5.1 in Replit Agent’s production environment.
- A Replit employee recently promoted Anthropic’s flagship Opus 5.5, adding uncertainty about which models currently power the platform.
- Replit has not clarified the conflicting accounts and is not yet disclosing ARR.
- Cost was among Replit’s reasons for moving away from Anthropic, indicating financial pressure in selecting AI models.