Cost & PricingThe Token Cost of Reasoning Models: Paying for Hidden Output
Reasoning models emit tokens you never see and are billed for at output rates. How much that adds, and when the accuracy is worth it.
ReadNotes on models, agents, and what inference costs
Practical writing for developers building with large language models — how they work, how to pick one, and how to keep the bill predictable.
What inference costs, and why the billing model matters.
Cost & Pricing
Cost & PricingThe Token Cost of Tool Calls: Definitions Bill Every Turn
Tool definitions and results are prompt content, charged on every turn of every session. What a tool actually costs over a run, and how to shrink it.
ReadCost & PricingTrial Abuse and Fair Use on Flat-Rate AI Plans
Why a flat-rate AI plan needs a fair-use boundary at all, what abuse looks like in the usage data, and how a heavy user stays clearly on the right side of it.
ReadCost & PricingUsage Caps and Overages: Limits That Do Not Break Work
Hard caps stop runaway spend and stop your pipeline with it. How to design caps, warning paths and overage pricing that protect budget without outages.
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Cost & PricingVendor Lock-In Costs: Measure It Instead of Fearing It
The HTTP call is trivially portable. Prompt tuning, tool-call formats, evaluation baselines and caching semantics are not. How to measure and contain the expensive parts.
ReadCost & PricingWhat a Model Upgrade Costs Beyond the Per-Token Rate
A newer model at a lower rate can still raise your monthly bill. Regression testing, prompt drift, output length and tool-call changes are where the cost actually lands.
ReadCost & PricingAI on a Student or Solo Developer Budget
You do not need a frontier model for most of what you do. A practical guide to getting real work done on AI when the budget is small and the meter is scary.
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Cost & PricingBatching Requests to Save Money: When It Pays
Batch endpoints trade latency for a large discount, and packing items into one prompt amortises overhead. Here is when each pays and when neither does.
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Cost & PricingContext Window Cost Tradeoffs: Bigger Is Not Free
A million-token window changes what you can do and what you will pay. Here is the arithmetic for filling one, and when retrieval beats stuffing on cost.
ReadCost & PricingCost Per Pull Request: A Unit Metric Worth Tracking
Total AI spend tells you nothing actionable. Cost per merged pull request ties inference to delivered work and exposes exactly where the money goes.
ReadCost & PricingCutting Token Usage Without Making Answers Worse
Most prompts carry substantial waste. Nine techniques that reduce spend while usually improving output quality, ordered by how much they actually save.
ReadCost & PricingForecasting AI Spend Without Guessing
Most AI budget forecasts are a headcount multiplied by a hopeful number. Here is a model that decomposes spend into drivers you can actually measure and control.
ReadShowing 37–48 of 62 articles