---
session_id: "1373474"
title: "Post-Training Gemini 4 for Real Engineering Work"
phase: live
last_checked: 2026-11-12T18:52:58-08:00
render: 20261113-025258-ddff00
---

# Links: Post-Training Gemini 4 for Real Engineering Work

## Speaker

**Melvin Johnson**, VP of Research, Gemini Post-Training, Google DeepMind

- X: [@melvinjohnsonp](https://x.com/melvinjohnsonp)

## Company

**[Google DeepMind: Gemini](https://deepmind.google/models/gemini/)**: "Our
next era of frontier intelligence, built to solve your hardest problems." (from
the site)

## Resources

- **Blog** · [Introducing Gemini 4 Hydrogen for Agentic Workflows](https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/)
  (Google, 2026-11-12). The model the talk announces, launched the same day.
- **Blog** · [Gemini 4 Hydrogen: Fast agentic development for coders](https://blog.google/innovation-and-ai/technology/developers-tools/build-with-gemini-4-hydrogen/)
  (Google, 2026-11-12). The developer post, for building with it.
- **Blog** · [Introducing Gemini 4 Carbon](https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-carbon/)
  (Google, 2026-10-28). The frontier model behind the benchmark and
  cheating-rate figures.
- **Blog** · [Gemini 4 Hydrogen and Orchestrator](https://antigravity.google/blog/gemini-4-hydrogen-in-google-antigravity/)
  (Antigravity, 2026-11-12). Hydrogen in Antigravity, the tool behind the
  dogfooding loop.
- **Video** · [Nov 12 Mainstage livestream, from about 7:35:20](https://www.youtube.com/watch?v=y9JtCCZP2MQ&t=27320s)
  (full-day Mainstage livestream, not a per-talk video; the offset is approximate).

## Gaps

- LinkedIn (from the roster) answered 999 with no page title; not published.
- No write-up of the post-training methods (rubric graders, hardened grader
  sandboxes, fabrication filtering, blind battles) found; the posts above are
  launch announcements.
- The fabrication figures and the 236-day / 28-day release gap have no public
  source found.
- The opening demo video is not transcribed.
- No per-talk recording or slides yet. The dossier rechecks every 6 hours until
  72 hours after the event, then daily.