Sakana Chat opens up its memory: what it stored, when it was used, and how it connects

Sakana Chat's memory has moved from invisible to inspectable: My Fish shows what the assistant remembers about a user, when those memories are used, and how they connect to one another. Until now the memory feature worked behind the scenes, so users could not see what Sakana Chat had stored or confirm whether a given memory had been used. My Fish offers Overview, Connections, and History views, with Overview grouping all memories into categories such as profile, preferences, current projects, and favorite topics.

Each memory carries checkable metadata, and users can follow it back to the conversation that produced it. Previously users could only infer from the conversation experience what the system had retained, without item-by-item verification. Every memory shows how many facts it contains, how often it has been read, and when it was last used; opening one reveals the individual facts and their source conversations, with a direct jump back to the original chat.

Memory activity is visible during the conversation itself, without opening Settings. Before, checking whether memory had been invoked meant leaving the conversation to look at settings. When Sakana Chat reads or saves a memory while composing a response, a small chip appears in its thinking process, such as “Checked memory: Trip to Spain, Hiking” or “Learned something new: Osaka marathon,” and selecting the chip opens that memory directly in My Fish.

My Fish is aimed at Sakana Chat users on web and mobile, reached through Settings. It displays information that may remain useful across conversations rather than storing every conversation. In the Connections map, a node closer to the center was used more recently, a larger node is used more often, memories unused for 30 days or more fade, and lines connect memories that appeared together in the same reply. Sakana AI says making memory visible is only the first step and that it will keep improving how memories take shape and update.

Memory is on by default but does not keep every conversation, focusing instead on information likely to be useful across conversations; users can turn memory off at any time in Settings or chat without using memory. Sakana AI says it will explore more intelligent ways for memories to take shape, evolve, and stay useful, indicating the current form is still evolving.