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TL;DR — Key Takeaways JetBrains has launched Junie Local, an on-device version of its AI coding agent that runs entirely on supported Macs without cloud inference or token charges. Junie Local uses a JetBrains-tuned, 4-bit quantized Qwen3.6-27B model and can inspect code, make changes, run commands and iterate locally. JetBrains says its internal testing put Qwen3.6-27B roughly on par with Claude Sonnet 4.5 on its private coding benchmark, with GPT-5 at medium effort scoring slightly higher.