# HBM4 insights

Rangoon Insights reporting and guides tagged HBM4.

Canonical: https://rangoon.ai/insights/tags/hbm4/

## Topics
- [Agent systems](https://rangoon.ai/insights/topics/agents/): Agent runtimes, handoffs, tools, and the boundaries that make them reviewable.
- [Governance](https://rangoon.ai/insights/topics/governance/): Policy, identity, authorization, approvals, and evidence for consequential work.
- [Infrastructure](https://rangoon.ai/insights/topics/infrastructure/): Model serving, sandboxes, tool services, and deployment boundaries.
- [Models](https://rangoon.ai/insights/topics/models/): Inference choices, local serving, compatibility, and operational tradeoffs.

## Stories
- [Samsung said it began HBM4 mass production and commercial shipment](https://rangoon.ai/insights/archive-samsung-hbm4-commercial-shipment-february-2026/)
  Samsung said on February 12, 2026 that it began HBM4 mass production and commercial shipment, with stated 12-high capacity, I/O and bandwidth figures for AI systems.
- [SK hynix said its HBM4 development was complete and its mass-production system was ready](https://rangoon.ai/insights/archive-sk-hynix-hbm4-production-system-september-2025/)
  SK hynix announced on September 12, 2025 that it had completed HBM4 development and readied a mass-production system after March samples.
- [Micron’s HBM4 samples separated customer evaluation from a 2026 ramp plan](https://rangoon.ai/insights/archive-micron-hbm4-samples-2025/)
  Micron announced HBM4 36GB 12-high samples on June 10, 2025. The release paired present samples with a planned future ramp, a distinction procurement records must retain.
- [SK hynix’s HBM4 samples marked a qualification stage, not volume supply](https://rangoon.ai/insights/archive-sk-hynix-hbm4-samples-2025/)
  SK hynix said it shipped 12-layer HBM4 samples to customers on March 19, 2025. The event showed why sample, qualification, and mass-production records need separate meanings.


## More information

- [Documentation index](https://rangoon.ai/llms.txt)
- [AI access and policies](https://rangoon.ai/ai/)
- [Source repository](https://github.com/hypler-dev/rangoon)