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IMO DeepSeek v4 demonstrated utter confidence and competence by not benchmaxxing, not focusing on some BS final run cost, not even spending inference-optimal compute. just showed up, demonstrated SOTA long context efficiency techniques (CSA, HCA, mHC, flash at 8% cost of pro, which itself is 14% cost of opus), dropped the best open base models in the world, peaced out. BYO posttraining. leave that to the agent labs to pick up the scraps. bravo.