Perplexity too, which I've found the most useful for access to top-end AI models with a massive reduction in hallucinations.

This is only via API though. There is a level of magic that Claude.ai and ChatGPT bring to the table that makes it worthwhile.

I can't speak to any new features announced today but the API version of Claude has been superior in every way when paired with a more feature rich front end.

> when paired with a more feature rich front end.

what frontend are you talking about?

Something like Sillytavern let's you edit the AI output which isn't an option in the web version.

Sillytavern also supports prefills which is an API feature not allowed on the web version.

Editing the system prompt is also not permitted in the web version but should be doable in any third party front-end.

I also use Poe sometimes which doesn't have all those features but at least allows custom system prompts when using Claude.

This is only in the chat mode. You also don't get the full context limit and file uploads for those modes.