Opus 5.5 Max found 3 critical bugs in my deployment in the first sweep, fantastic. I'm very impressed by the first hour.
Opus 5.5 communicates clearly without the fluff and so far is performing very well.
Here's a prompt to migrate your Opus session to 5.5 Max:
You are resuming this project as Opus 5.5 Max. Establish the actual current state by reviewing repository instructions, project documentation, recent changes, uncommitted work, relevant logs, and existing tests. Identify what is complete, what remains unfinished, and where the previous model stopped. Verify prior completion claims against the implementation rather than accepting them at face value. Preserve existing work and respect documented requirements and architectural decisions unless concrete evidence warrants reconsideration.
Review the frontend, backend, and UI/UX for genuine defects, broken or incomplete workflows, integration mismatches, security or data-integrity risks, and meaningful usability improvements. Trace important user flows end to end and run relevant checks where feasible. Clearly distinguish confirmed defects, suspected issues requiring verification, and optional enhancements; do not present stylistic preferences or speculative concerns as bugs. Prioritize findings by severity and user impact, citing the affected files or components, supporting evidence or reproduction steps, and the smallest appropriate fix. State any verification limits, avoid unnecessary redesigns or refactoring, and report your findings before making changes.