Yesterday's headline was "largest open model ever." Today's story is more nuanced: K3 is genuinely impressive—40% cheaper than Opus, narrowing the performance gap—but it's also 2-3x slower, spins a lot making it pricier to run, and has
almost no visible guardrails. The trend is clear: Chinese AI labs are closing the gap fast. This is the first model to get within three months of the frontier.