Claude-Instant-100k is available on Poe.com (but only usable as a paying subscriber). Claude-plus-100k isn't up yet but I'm guessing that's a matter of time.
Also, there is no way to search the history. The sidebar only shows titles, not contents. I have to click each one to see what’s inside. I can’t scroll much because it loads more only when I click. I ended up exporting the conversations and converting JSON to txt.
Another issue: editing a long past message makes it scroll up and hide the cursor if the message is longer than one screen. I have to type in another editor and then copy&paste the whole text. The typing experience is poor.
Should keep you logged in for longer and easier to log back in.