AI code agent that plans, writes, and ships code using top AI models from OpenAI, Anthropic, and Google at no cost.
cto.new is a free AI-powered code agent built by Engine Labs that plans and generates production-ready code using frontier models like GPT-5 Codex, Claude Sonnet 4.5, and Gemini Pro. It breaks complex projects into manageable tasks, writes code, runs linters, and submits pull requests. The platform integrates with GitHub, Linear, Jira, and Slack, fitting directly into your existing workflow.
cto.new provides access to multiple frontier models, including OpenAI GPT models, Anthropic Claude models, and Google Gemini models. Its “Alloys” system can route or combine multiple models within a single task, allowing different models to handle planning, coding, debugging, and review inside one workflow.
Your code remains private within your workspace and connected repositories. The platform uses encrypted communication and secure sandbox environments. It may use anonymized usage data and system telemetry to improve performance and reliability. Your repository content is not publicly exposed and is only accessible within your authenticated environment.
cto.new integrates directly with common developer tools including GitHub, GitLab, Linear, Jira, and Slack. It also supports MCP integrations, allowing connections to external tools such as Sentry, Vercel, and other observability or workflow systems. Developers can assign work directly from issues or project management tools, and the agent will generate code changes and pull requests based on those tasks.
Yes. You can run multiple tasks in parallel across different repositories. For best results, avoid overlapping edits on the same files, as this may lead to merge conflicts or conflicting changes between tasks.
cto.new is an asynchronous AI coding agent focused on full task execution rather than in-editor assistance. It handles:
cto.new is widely used by individual developers, freelancers, and startups. For enterprise adoption, teams should evaluate:
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