An open-source alternative to ChatGPT that runs entirely offline on your computer. [![Open-Source Software][OSS Icon] ![Freeware][Freeware Icon]](https://github.com/menloresearch/jan)
Smarter, more personal answers as ChatGPT's new default
GPT-5.5 Instant replaces GPT-5.3 as ChatGPT's default model with smarter, more concise answers, improved personalization from past chats and connected Gmail, and memory source controls. For ChatGPT users on all plans.
An open-source alternative to ChatGPT that runs entirely offline on your computer. [![Open-Source Software][OSS Icon] ![Freeware][Freeware Icon]](https://github.com/menloresearch/jan)
LLM engineering platform for model tracing, prompt management, and application evaluation. Langfuse helps teams collaboratively debug, analyze, and iterate on their LLM applications such as chatbots o