Since the 3rd party providers on openrouter have all converged on much higher prices in serving these models (both mimo and dsv4), there's obviously a question on how/why are they lowering the prices so much. It's possible they've finally integrated cheap(er) chinese chips. It's also possible they're just subsidising inference for real-world usage data. Interesting either way.
Also, DSv4 has access to Huawei Ascend GPUs that have native FP4 that allows all-native FP4+FP8 mixed compute that is more efficient than emulated FP4. Less so for 3rd party providers.