Dirac - Accurate & Highly Token Efficient Open Source AI Agent Dirac topped the Terminal-Bench-2 leaderboard for gemini-3-flash-preview with a 65.2% score! It is a well studied phenomenon that any given model's reasoning ability degrades with the context length. If we can keep context tightly curated, we improve both accuracy and cost while making larger changes tractable in a single task. Dirac is an open-source coding agent built with this in mind. It reduces API costs by 64.8% on average while producing better and faster work. Using hash-anchored parallel edits, AST manipulation, and a suite of advanced optimizations. Oh, and no MCP. Our goal: Optimize for bang-for-the-buck on tooling with bare minimum prompting instead of going blindly minimalistic. 📊 Evals Dirac is benchmarked against other leading open-source agents on complex, real-world refactoring tasks. Dirac consistently achieves 100% accuracy at a fraction of the cost.…