Blog
Stop burning tokens on dead ends
What Evals Are, and Where They Fall Short
Guide
LLM Evals: The Complete Guide to What They Measure (and What They Miss)
ArticleEval Drift: Why Yesterday's Passing Score Fails Today
ArticleHow Often Should You Re-Run Evals on a Production Agent?
ArticleThe Limits of Static Benchmarks for Production Agents
ArticleWhat Is an LLM Eval, Really?
ArticleWhy a 95% Eval Score Doesn't Mean 95% Reliability
Classifiers for Model Behavior
Guide
Classifiers for Model Behavior: A Practical Guide
ArticleBuild vs. Buy: Should You Train Your Own Run Classifier?
ArticleEarly-Stopping Signals for Long-Running Agents
ArticleHow to Predict a Model Run's Outcome From Its First 50 Tokens
ArticleLogprob, Entropy, Margin: The Signals a Classifier Actually Reads
ArticleWhy Model Confidence Scores Alone Aren't Enough to Trust
Routers / Model Routing
Guide
Cost-Aware Model Routing, Explained
ArticleModel Routing vs. Model Selection: What's the Difference?
ArticleMulti-Model Fallback Strategies for Production AI
ArticleRouting by Task Difficulty Instead of Task Type
ArticleThe Latency Cost of Routing Decisions (and How to Hide It)
ArticleWhen to Route Down to a Cheaper Model Mid-Run
Controllers / Agent Harnesses
Guide
What an Agent Harness Actually Controls
ArticleAgent Harness vs. Orchestration Framework: Where's the Line?
ArticleKill Switches for Runaway Agent Loops
ArticleSetting Per-Run Budget Caps Without Breaking the Task
ArticleWhat to Log at the Controller Layer (and What's Noise)
ArticleWhen a Kill Decision Should Go to a Human, Not the Controller
Token Economics / AI Spend
Guide
Where Enterprise AI Budgets Actually Go
ArticleHow to Actually Measure ROI on Agent API Spend
ArticleThe Cost of Letting a Dead-End Run Finish
ArticleThe Hidden Cost of Agent Retries Nobody Budgets For
ArticleToken Spend per Employee: What's Normal in 2026?
ArticleWhy Top-Tier AI Spenders Waste the Same 67% as Everyone Else
X vs. Evals
Guide
Static Benchmarks vs. Live Classification: A Head-to-Head
ArticleGuardrails vs. Classifiers: Different Jobs, Often Confused
ArticleManual QA vs. Automated Run Classification
ArticlePrompt Engineering vs. Model Routing for Cost Control
ArticleResponse Caching vs. Model Routing: Which Cuts Cost Faster?
ArticleSingle-Model vs. Multi-Model Stacks: Choosing for Cost and Reliability
Glossary
Guide