DeepSeek is raising the stakes after its $7.4 billion funding round. The Chinese AI firm, known for undercutting rivals on price, just announced a "significant increase" in API costs—a contrarian move that signals a shift from growth-at-all-costs to sustainable unit economics. With plans for its own chips and a massive data center, DeepSeek is clearly eyeing an IPO. The real twist? It's reportedly back in the market for another $8 billion, pushing its valuation to over **$74...