Hi! We’re evaluating AnyChat for an agency with multiple client workspaces. Your docs refer to OpenAI’s Assistants API, which was sunset on August 26, 2026. Please confirm:

Have file/website-trained assistants migrated to Responses API?
Do they work with new OpenAI API projects?
Can each workspace use a separate OpenAI key?
Can OpenRouter use uploaded files and website URLs, or only OpenAI?
Can you crawl a full website via sitemap and automatically resync changes?
Which current OpenAI models are supported?
Are embeddings, vector storage and file search billed to our API account?
Can we set usage or spending limits per workspace?