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Notes on AI cost engineering.

Routing, caching, compression, and the finance of inference — from the team building Trimio.

FEATURED · FINOPS
The $47K loop, the $3.4B bill: three stories about AI budget failure

Three real case studies: a $47K agentic loop, a $3.4B enterprise AI bill, and a team that kept paying for the same answers. What they got wrong and how cost governance would have caught each one.

May 21, 2026
$47K
one agentic loop, one weekend
AI-CODING
AI Writes Your Code. Who Audits Which Call Wrote the Bug?

"If coding has been solved, why does software keep getting worse?" hit HN at 440 points with 364 comments — one of the most engaged threads of the week. The thesis: the AI codin...

July 25, 2026
GDPR
Digital Sovereignty Is Becoming an AI Infrastructure Criterion

The EU GDPR enforcement actions of 2025 included over €1.6 billion in total fines, a record year. AI data processing is now explicitly in scope: any AI system processing persona...

May 21, 2026
LOCK-IN
The Session You Cannot Take With You — and Why Your Routing Layer Is the Exit

On July 31, 2026, an essay titled "The Session You Cannot Take With You" hit #1 on Hacker News with 467 points and 118 comments. The argument is simple and correct: AI agent ses...

July 31, 2026
ANTHROPIC
Today Is the Day Anthropic Changed How It Bills You

June 15, 2026. If your team uses Anthropic's API under a Pro, Max 5×, or Max 20× plan, your billing model changed this morning. Not a policy update. Not an email warning. The ch...

June 15, 2026
ROUTING
The quality floor is the whole game

Cost savings don't matter if quality drops. When GLM-5.2 hit a pricing floor that wasn't matched by capability, hedge routing wasn't a nice-to-have — it was the whole game.

July 8, 2026
GOVERNANCE
What is AI governance after Friday?

After the Fable 5 killswitch incident, every CIO is asking one question: who actually owns AI governance when the provider can pull access unilaterally?

June 16, 2026
PRICING
The Claude billing split: what actually changed on June 15

Anthropic changed how it bills Claude API calls. The change is small in copy but sizable in cost impact for high-context workflows. Here is what moved.

June 9, 2026
FINOPS
The $10K day problem: why LLM vendors won't save you from yourself

LLM vendors are running the same playbook credit-card companies ran in 2014: frictionless to start, frictionless to fail. A $10K day is not a bug — it's the design.

May 27, 2026
FINOPS
Goodhart's law meets your AI budget

When the measure becomes the target, it ceases to be a good measure. AI budgets hit Goodhart's Law when teams optimize cost-per-call instead of cost-per-outcome.

May 22, 2026
SECURITY
Two LiteLLM security incidents in six weeks

CVE-2026-42208 and CVE-2026-42912 — and what they say about the AI gateway architecture layer: defaults matter, and language choice is a security posture.

May 21, 2026
BUDGETS
Soft limits, hard limits, and spend forecasts

The difference between a soft limit and a hard limit isn't a policy choice — it's a billing-event choice. How to design AI budgets that don't surprise you.

May 20, 2026
ENGINEERING
When AI writes your code, the ROI bottleneck shifts to API cost

When Cursor, Copilot, and Claude Code write 60% of your PRs, the ROI math changes. The bottleneck is no longer developer throughput — it's the API bill.

May 20, 2026
CASE STUDY
When your engineering team goes AI-native: the Uber lesson

Uber's 2026 retrospective is the clearest field report on what happens when an engineering org goes fully AI-native — and what the budget caught first.

May 20, 2026
MARKET
Why Palo Alto bought Portkey

The AI gateway category has split into three lanes: security-first, performance-first, and economics-first. What the acquisition says about where the money is.

April 30, 2026

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