Cursor AI July 13: Cursor 3.11 Ships Side Chats (/side, /btw), GPT-5.6 Sol Hits 67.2% on CursorBench, Cursor Trains SpaceXAI's Grok 4.5

Cursor 3.11: Side Chats (/side, /btw) Run Alongside Your Main Agent, Plus Searchable Agent Transcripts

• On July 10, Cursor 3.11 added side chats that run alongside your main chat.
• Open one with /side, /btw or the plus button to ask questions, research alternatives and sanity-check a decision without interrupting the main agent, which keeps running.
• Each side chat is a durable, full agent conversation you can revisit and at-mention to pull context back into the main thread; by default they focus on reading, searching and answering.
• The release also lets you search agent transcripts from the command palette in the Agents Window, and simplifies the project and repo pickers.

Editor’s read: Side chats fix the real cost of a mid-task tangent: you no longer poison your main agent's context to ask a clarifying question. Use them to research a pivot before you commit to it.

GPT-5.6 Sol, Terra and Luna Now Available in Cursor: Sol Scores 67.2% on CursorBench

• On July 9, Cursor made OpenAI's GPT-5.6 Sol, Terra and Luna available, with Sol scoring 67.2% on CursorBench.

Cursor Partners With SpaceXAI to Train Grok 4.5 - Its Most Powerful Model Yet and First Beyond Software Engineering

• On July 8, Cursor announced it partnered with SpaceXAI to train Grok 4.5, calling it its most powerful model yet and the first Cursor built for more than software engineering.
• Grok 4.5 is available in Cursor on all plans, priced at $2 per million input tokens and $6 for output.

Grok 4.5 Now Available to All Vercel AI Gateway Customers, Announces Guillermo Rauch

• On July 8, Vercel CEO Guillermo Rauch announced that Grok 4.5.
• the model Cursor helped train.
• is now available to all Vercel AI Gateway customers.

Best Model for Coding After a Chaotic Week: GPT-5.6 vs Grok 4.5 vs Claude Fable 5 on Price and Benchmarks

• On July 10, Yellow.com compared the week's releases: GPT-5.6 Sol lists at $5/$30 per million tokens, Grok 4.5 at $2/$6, and Claude Fable 5 at $10/$50.
• Fable 5 leads coding at 80.4% on SWE-Bench Pro versus Grok 4.5's 64.7% and GPT-5.5's 58.6%, while independent analysis shows Grok 4.5 completing comparable coding tasks for $2.49 versus $11.80 for Fable 5.