Cursor adds Sonnet 5.5 and inline visualizations

Cursor announced two product updates on September 28 and 29: Claude Sonnet 5.5 became available in Cursor, and the Agents Window gained a /visualize command for charts and diagrams in chat.

Sonnet 5.5 in Cursor

Cursor’s September 28 post says Sonnet 5.5 is available in Cursor and describes it as performing “on par with Opus in many tasks.” Cursor’s model documentation lists Sonnet 5.5 as an available model with thinking mode and context windows up to 1M tokens; users can add it from Cursor Settings → Models.

The announcement does not specify plan eligibility or a rollout schedule. Treat the performance comparison as Cursor’s characterization and verify current access in the model picker.

Build charts and diagrams inline

On September 29, Cursor said users can type /visualize to analyze data and see charts or diagrams directly in chat. The post says the feature is available in the Agents Window. The announcement does not describe supported data formats, chart types, or plan limits, so those details should be checked in the product rather than assumed.

Sources

• Cursor on X — Sonnet 5.5 availability announcement (September 28, 2026): https://x.com/cursor_ai/status/2104666044220821594
• Cursor Docs — “Claude Sonnet 5.5”: https://cursor.com/docs/models/claude-sonnet-5-5
• Cursor on X — /visualize announcement (September 29, 2026): https://x.com/cursor_ai/status/2105012114200887434