Frontier AI access is the new scarcity, not price

Tom Tunguz 谈前沿 AI 的准入分层：访问权成为新的稀缺资源

Tom Tunguz maps how frontier AI access is segmenting from both ends of the supply chain in summer 2026. Upstream, Anthropic locked Mythos 5 behind Project Glasswing's whitelist, and Fable went US-only after a Commerce Department export order. OpenAI previewed GPT-5.6 government variants to a small trusted group. Z.ai added a $10B host-revenue security review to its flagship GLM-5.3 license—open weights now mean open until you scale. Downstream, Salesforce hardcoded Claude into Agentforce and Slack, shrinking enterprise model choice. OpenAI cut Cursor's API access after SpaceX bought the company. The one counterforce: Nvidia is pouring $26B into Nemotron open weights, $13B into Hugging Face, and $7B into Poolside to keep ecosystems open. Access, not price, is the new scarcity.

Why it matters: Tunguz connects this summer's frontier model access segmentation into a clear thread, from upstream whitelists to downstream default model bundling. High information density with named vendors and mechanisms. Not scored higher because it's synthesis rather than original report...