Claude Opus 5 uses effort as the primary control, from low through max.

The control that matters is effort level, because max is reserved for capability-critical work.

For Claude Opus 5, steering means choosing an effort level, with max reserved for capability-critical work.

• 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.