It seems you're referring to the Kaiten line of robots, which was developed by Google's DeepMind research team. The Kaiten robots are designed to be fully human-like, with a focus on AI, consciousness, and emotions. Here's a brief overview of the Kaiten line: 2. Kaiten 2: The first robot to have a human-like presence, combining human-like intelligence with a humanoid body. 3. Kaiten 3: A more advanced version with a human-like mind, though it's still in a conceptual stage. 4. Kaiten 4: A more advanced version of Kaiten 3, with a focus on real-world applications and practicality.

As of now, Kaiten 4 is still in the early development stages and is not yet available for public release. However, there have been some early development versions, such as Kaiten 4, which are available for download. You can find these on the official Google website or on their social media channels.

If you're interested in learning more about the Kaiten line or its future developments, you can visit the official Google DeepMind website or follow them on social media for the latest updates.