Anthropic added beta mid-conversation tool changes while preserving the prompt cache.

The useful part is cache preservation when tools change mid-conversation.

It sits behind a beta header, so builders must include it to use turn-level tool changes.

• Aug 12, 2026OpenAI made it easier to bring documents and saved files into conversations and resume work.
• Aug 12, 2026OpenAI added mobile Voice safeguards that check inactive background conversations and end sessions without a response.
• Aug 12, 2026ChatGPT web now preserves pasted formatting, adds saved files from Library, multi-selects items, and expands search.

This is the world we build in. It moves this fast. We move with it.