This page may contain stale information. Last updated: 2026-07-01
Overview
Base1 (also “Base One”) is base44’s proprietary LLM for vibe-coding web applications, launched July 2026. Fine-tuned open-source base with reinforcement learning on platform interaction data.
Training
- Tens of millions of real user app-building sessions on Base44
- RL signal: user acceptance/rejection of generated apps
- Tuned to Base44 agentic harness (tools, instructions, workflows)
- Developed with wix ML team (Wix Harmony heritage)
"Proprietary model" = fine-tune on open-source base, not from-scratch training per CEO Maor Shlomo ( 2026-07-01-base44-base1-thenewstack).