Cost-per-success, not cost-per-call: the LLM routing number nobody measures
Member-only storyAIAi OpsAi FinopsSoftware DevelopmentSoftware EngineeringThe Cheap Model That Tripled Your BillNitish Agarwal10 min read·Just now--ListenSharePress enter or click to view image in full sizePhoto by Giorgio Trovato on UnsplashSomebody on your team did the responsible thing. They looked at the invoice, saw that the flagship model was eating the budget, and re-pointed the agent at the cheap tier. Then two weeks later the bill went up, the p95 latency got worse, and a ticket landed in the queue titled “model getting stuck in loop.” Nobody had lied.
- ▪Member-only storyAIAi OpsAi FinopsSoftware DevelopmentSoftware EngineeringThe Cheap Model That Tripled Your BillNitish Agarwal10 min read·Just now--ListenSharePress enter or click to view image in full sizePhoto by Giorgio Trovato on Unspla
- ▪They looked at the invoice, saw that the flagship model was eating the budget, and re-pointed the agent at the cheap tier.
- ▪Then two weeks later the bill went up, the p95 latency got worse, and a ticket landed in the queue titled “model getting stuck in loop.” Nobody had lied.
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Story provenance
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| Original publisher | Medium |
| Canonical URL | https://nitishagar.medium.com/the-cheap-model-that-tripled-your-bill-06c5c796fa25 |
| Publication time | Wed, 12 Aug 2026 09:57:48 +0000 |
| Retrieval time | 2026-08-12T10:21:32.007Z |
| Last seen | 2026-08-12T10:21:32.007Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | 6E8ZCU6mrvJ5 · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Member-only storyAIAi OpsAi FinopsSoftware DevelopmentSoftware EngineeringThe Cheap Model That Tripled Your BillNitish Agarwal10 min read·Just now--ListenSharePress enter or click to view image in full sizePhoto by Giorgio Trovato on UnsplashSomebody on your team did the responsible thing. They looked at the invoice, saw that the flagship model was eating the budget, and re-pointed the agent at the cheap tier. Ship it. Save money. Then two weeks later the bill went up, the p95 latency got worse, and a ticket landed in the queue titled “model getting stuck in loop.” Nobody had lied. The per-call price really had dropped. The system just started failing more often, and every failure cost you twice.This is the trap, and it’s not a model problem. It’s a measurement problem.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Medium.
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