Spar – Make Claude and Codex argue to get the best outputs (github.com)

A new tool called Spar enables users to pit AI models Claude and ChatGPT against each other to refine outputs through iterative questioning. By facilitating a back-and-forth debugging process, users can paste responses between the two AIs until they reach a point where no further improvements are made. This tool is designed for a range of applications, from decision-making to coding, making it accessible to individuals and teams already using Claude Code or Codex under their existing plans. The significance of Spar lies in its innovative approach to leveraging multiple AI models to ensure higher output quality. By having one model critique the other's response, the tool mitigates potential biases that could arise from a single model agreeing with itself. It operates within users' existing API plans, allowing them to extract the best insights without additional cost. With features like automatic turn management, direct file input, and detailed control over the interaction process, Spar positions itself as a practical solution for those seeking more reliable and accurate AI-generated content.