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Qwen vs. Qwen: two model generations head to head

Qwen3.6-27B against Qwen3.8-27B on the same 20 agent tasks - both dense, both 27 billion parameters, both on the same endpoint. 744 scored runs, 19 protocols read move by move. As a PDF, free of charge.

• Pass rate 88.4 vs. 94.2 percent - and why the new generation loses nine of 38 cells
• Seven case stories with original moves: the new generation wins four, the old one three
• The token bill: +32% median, +80% mean - at practically the same number of moves
• A chapter on the measurement error this volume corrects in itself: the wrong opponent

PDF, 65 pages, English - no account needed, no payment.