Behaviorally modified MXFP4 research checkpoint derived from XiaomiMiMo/MiMo-V2.6-Flash-RL. DERISKED identifies the Blackfrost release family. It is not a claim of zero refusals, complete safety, harmlessness, or production readiness. Refusal measurements will be published only after evaluation of the exact uploaded artifact is complete. MIMO-V2.6-DERISKED-MXFP4 is an independent Blackfrost research derivative of XiaomiMiMo/MiMo-V2.6-Flash-RL. The checkpoint retains the upstream MiMo V2.6 architecture, tokenizer, multimodal components, native chat template, and speculative-decoding assets while preserving its mixed-precision MXFP4 deployment layout. The behavioral modification is encoded in…