MiroThinker H1 Tops GPT 5.4 and Claude Opus on BrowseComp; 3B Open-Source Variant Beats GPT 5 on GAIA

r/singularity·medium signal

MiroThinker H1 scores 88.2 on BrowseComp (arXiv:2603.15726), surpassing both Gemini 3.1 Pro and Claude 4.6 Opus. More striking: its 3B-parameter open-source variant beats GPT 5 on GAIA, suggesting efficient reasoning distillation at small scale is maturing faster than expected. No release date or weights availability confirmed yet.