Anthropic deprecated Claude Sonnet 4 and Claude Opus 4, with Claude API retirement on June 15, 2026.

API users need migration work now because the named models have a posted retirement path.

This sits in model deprecations, moving builders from deprecated Sonnet and Opus IDs to recommended replacements.

• Jul 18, 2026Anthropic model card shows no readable text change in this diff.
• Jul 18, 2026Anthropic pricing page removed the Claude plan recommendation questionnaire content.
• Jul 18, 2026ChatGPT scheduled tasks gained a sidebar page for viewing, managing, and editing active tasks.

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