Qwen3.6-27B vs Qwen3 Coder-Next: 20-Hour Head-to-Head Benchmark on Dual RTX PRO 6000 Blackwells

r/LocalLLaMA·medium signal

A practitioner burned 20 hours of side-by-side compute on two RTX PRO 6000 Blackwell GPUs comparing Qwen3.6-27B (dense, 77.2% SWE-bench Verified) against Qwen3 Coder-Next (80B MoE, 3B active params, 44.3% SWE-bench Pro). Key finding: neither model is clearly better across all tasks — Qwen3.6-27B excels at reasoning-heavy code while Coder-Next produces cleaner project architectures with proper test suites. With Context7 documentation access, Coder-Next completed tasks in 17 minutes vs 32 and achieved 16 passing tests vs 14.