[rtfeldman]

A better argument against vector embeddings for AI code agents is that model performance degrades with number of tokens used (even when well below the context window limit), and vector chunks are more prone to bloating the context window with unhelpful noise than more targeted search techniques.

Claude Code doesn't do vector indexing, and neither does Zed. There aren't any rigorous studies comparing these tools, but you can find plenty of anecdotes of people preferring the output of Claude Code and/or Zed to Cursor's, and search technique is certainly a factor there!