Why does it actually matter that DeepSeek and Kimi are both hitting open weight milestones this same week?

[Lewis_43]

Quick explainer for anyone confused by why this specific week keeps coming up in AI discussions. DeepSeek V4 Pro actually shipped its open weights back on April 24, available under a fully permissive MIT license on Hugging Face from day one, at roughly 0.44 dollars per million output tokens, easily the cheapest capable frontier grade open model on the market. What is actually happening this week is that DeepSeek's older legacy API endpoints, the original deepseek-chat and deepseek-reasoner names, are being retired on July 24, forcing anyone still using those older endpoints to migrate over to the V4 naming

Kimi K3 is the genuinely new part of this story. Moonshot released K3 as an API only model on July 16, and it reportedly topped a major coding leaderboard almost immediately, but the actual downloadable weights were not included at launch. Moonshot has committed to releasing those full weights by July 27, under a modified MIT license that only adds an attribution requirement once a company crosses 100 million monthly active users, which is irrelevant for the vast majority of businesses that might want to use it

Why any of this matters practically, once K3's weights are actually out, any company with enough hardware can self host what is reportedly a near frontier coding model with zero per token API cost, rather than paying Moonshot's API pricing which currently runs 5 to 17 times higher per token than DeepSeek's V4 Pro. That is the real headline, not the specific date, but the fact that self hosting a genuinely competitive coding model becomes an option for teams who previously assumed only the expensive closed API providers could deliver this level of quality

Kimi K3 Open Weights: A July 27 Readiness Checklistwww.digitalapplied.com

[Seb51]

So DeepSeek V4 has actually been open for months already, it is just the old endpoint names getting deprecated this week, that clears up a lot of confusion I had