HISTORICAL OBSERVATION / ROW 93
OpenAI + Anthropic separately brief House Homeland Security Committee staff on cyber-capable frontier models (OpenAI GPT-5.4-Cyber + Anthropic Mythos Preview) — first vendor-Hill cyber capability briefings
Title and labels preserved from the historical tracker.
- Observed
- Original stage
- Launched
- Original source type
- Press
https://www.axios.com/2026/04/28/openai-anthropic-congress-cyber-briefings
Record provenance
Historical tracker · Signals sheet · row 93
Snapshot through 2026-06-19. Original stage labels are historical annotations; source availability and current status may differ.
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