Skip to content

Writing · Field notes from the operating layer

Ideas for operating AI, not merely adopting it.

Essays, field reports, frameworks, and technical guides for the people responsible for making AI work.

Current essay · Models & Engineering

The AI Most People Haven't Met Yet

Chatbots continue and coordinate symbolic information. A different class of model represents how a bounded environment may change, often conditioned on action. Both are useful. Treating them as the same thing is why enterprise AI conversations keep talking past each other.

Choose your path

Start with the work closest to the decisions you make.

Editorial pillars

Six editorial lenses. Each starts from a point of view, not a topic label.

Active series

Multi-part arguments, ordered as published.

Series / qwen38-local-wow

Qwen3.8: Same Weights, Different Product

A five-part investigation into how the harness and serving stack make Qwen3.8-27B useful: the reasoning dial, the harness delta (raw local 2/8 → harnessed 8/8), verified demos, portfolio economics, and native 262K context on 32 GB.

5 published parts5/5 planned
Browse in archive

Series / agent-native-work

Agent-Native Work

A four-part series on designing work for agents: why software got them first, every domain's AGENTS.md, the verification gap, and the practitioner-builder.

4 published parts4/4 planned
Browse in archive

Series / llm-os-modes

Modes of the LLM OS

A six-part series on the operating modes behind frontier AI: Chat, Agent, Deep Research, Cowork, and owned infrastructure.

6 published parts6/6 planned
Browse in archive

Series / token-economy

The Token Economy

A strategy and architecture series on token economics, model portfolios, and AI factory operations.

3 published parts3/3 planned
Browse in archive

Series / context-compilation

Context Compilation

The missing systems layer between retrieval and reasoning, from benchmark blind spots to measured evidence.

3 published parts3/3 planned
Browse in archive

Series / autonomous-stack

The Autonomous Stack

The architecture of intelligent systems, from the data substrate to agent runtimes and prescriptive intelligence.

4 published partsOngoing
Browse in archive

Series / agent-societies

Agent Societies

A field guide to what happens when agents interact at scale, from emergence to competence.

4 published partsOngoing
Browse in archive

Series / ai-native-computer

AI-Native Computer

A technical and operating-model series on what changes when AI becomes the computer, not just another app.

3 published partsOngoing
Browse in archive

Complete index

Archive

15 essays

Filters (1)
Pillar
Audience
Format
Series
  1. Research Note · August 21, 2026

    Useful AI Is Now Cheap: What One Consumer GPU Proved

    Useful intelligence now runs on one consumer GPU. Advantage shifts to workload selection, evaluation, and operations because cheap AI is not automatically reliable.

  2. Framework · August 16, 2026

    What Still Rents: The Portfolio Case for Local AI

    A ~$6K desk changes the default. Here is what still belongs in the cloud, and how to route work between owning and renting without tribalism.

  3. Technical Guide · July 28, 2026

    What Memory Bandwidth Actually Buys You: LLM Inference Hardware in 2026

    A first-principles guide to inference hardware from desk to rack — M5 Max, DGX Spark clusters, prosumer PCs, RTX PRO 6000, Lenovo 8× H200/B200 nodes, AMD Instinct, plus prefill vs decode math, VRAM sizing, and API vs rent vs own TCO.

  4. Framework · July 9, 2026

    The Verification Gap

    Verification is not merely the reliability blocker — it is the pricing lever. Where a domain can verify cheaply, it prices on outcomes and tunes smaller models. Where it cannot, it stays hostage to frontier tokens. Margin follows verification.

  5. Technical Guide · May 25, 2026

    Running Your Own LLM OS: The Enterprise Build

    Your CEO asks whether you can build your own. The answer is yes. Here is what that actually means — four modes, four stacks from Frontier API to an 8x B200 chassis on your own silicon, the near-frontier OSS shift that changed the calculus, and the control spectrum that cost analysis keeps missing.

  6. Framework · April 23, 2026

    From AI-Ready Infrastructure to AI Economics Platform

    Space, power, and cooling was the right product for the last era. It is not the right product for this one. A first-person argument — from inside Digital Realty — about where infrastructure platforms are actually going.

  7. Framework · April 20, 2026

    The Enterprise Token Scorecard

    Six numbers the CFO should read in thirty seconds. The metrics that separate mature AI operators from enthusiastic experimenters — and the trajectory that tells you, every quarter, whether the platform is actually being run.

  8. Framework · April 20, 2026

    Modes of the LLM OS: Why Frontier AI Runs in Four Modes, Not One

    When you hit enter in ChatGPT, Claude, or Cursor, you are not running one machine. You are running one of four operating modes of something that behaves like an operating system. Same GPUs. Five orders of magnitude in cost. Completely different governance surface.

  9. Framework · April 18, 2026

    Data Gravity Meets Token Economics

    When 93% of enterprise data is created outside the public cloud, the AI question stops being 'which model' and starts being 'where does inference run'. The executive companion to The CEO's Guide to Token Economics.

  10. Framework · April 17, 2026

    The CEO's Guide to Token Economics

    Why boards should stop asking what AI costs and start asking what a verified outcome costs. A non-technical playbook for the operating discipline that will separate AI leaders from AI spenders.

  11. Framework · April 12, 2026

    The Enterprise Model Portfolio

    The answer to the token economics problem isn't one model — it's a portfolio of six specialized model types served as internal API services. Near-frontier open models now handle 80–90% of enterprise tasks at a fraction of the cost.

  12. Framework · April 5, 2026

    The Token Bill Nobody's Ready For

    A single power user can generate 10-50 million AI tokens per day. Multiply that across an enterprise, and the math changes everything. Token economics is becoming the defining constraint of enterprise AI.

Newsletter · The Operating Layer

The dispatch for people accountable for making AI work.

A biweekly note on governed enterprise AI, written from inside the operating problem.

Read The Operating Layer
Writing | Brian Letort