Miju Labs

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I

Ioannis Antonoglou

Co-founder & CTO · Reflection AI

high confidenceTier B · Map and watchSecond-wave labstext

Why they are on the map

CTO; ex-DeepMind (AlphaGo/MuZero, Gemini post-training) source — evidence dated 2026-03

Needs the data for a model; writes the spec.

How Reflection AI buys data

Has a formal 'Data Acquisition' department (Ashby, 2025-26): 'Data Partnerships & Initiatives Manager' (NY, Dec 2025) evaluates suppliers, negotiates agreements, verifies deliverables; 'Data Quality Engineer (Post-training)' (Jan 2026) turns 'good data' into standards for 'large data campaigns'; 'Data Flywheel' MTS (Aug 2026) works with 'customers, partners, vendors'; 'Product Counsel, Data & Search' (London, Sep 2026); Evals team mentions human preference evals.

Departments: Research (Pre-/Mid-/Post-Training), Evals, Safety, Data Acquisition (partnerships, data quality, ingestion, crawl), Data Flywheel, Applied AI (forward-deployed post-training), Research Program Management. No leaders beyond the founders publicly named.

Full dossier pending

This person was mapped in pass 1. Career, what they have said on the record, interviews, connections, why they matter to us and how to reach them are added in pass 2.