{
  "id": 10049546,
  "title": "I changed nothing and my LLM server got 27% more expensive",
  "url": "https://urgent.news/2026/09/26/i-changed-nothing-and-my-llm-server-got-27-more-expensive",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-26T19:38:35.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/throttle_pro/i-changed-nothing-and-my-llm-server-got-27-more-expensive-4i1j"
  },
  "original_language": "en",
  "account": "The same server experienced a 27% increase in cost, followed by an 11% decrease, despite no changes being made. This discrepancy occurred because timing on a real machine can be influenced by various factors, such as other processes, background indexing, thermal state, memory pressure, and OS scheduling. On a shared cloud node, there may also be noisy neighbors and other tenants on the same host or network. The author found that measuring run-to-run noise directly helps determine the confidence interval and identify if a change is due to measurement noise or a true configuration change. The recommended approach is to run the unchanged configuration multiple times and analyze the standard deviation to estimate noise. With enough repeats and a quieter environment, one can better understand if a change is significant or just within the noise floor.",
  "summary": "I ran the same cost check four times in a row against a server I didn't touch. Same model, same machine, same prompts, same settings. This is what came back, in dollars per million output tokens: Run $/M output tokens 95% CI Change vs previous run 1 $8.77 $8.19 to $9.35 2 $8.86 $7.80 to $9.93 +1.0% 3 $11.26 $10.31 to $12.21 +27.1% 4 $10.02 $7.41 to $12.62 −11.0% Run 3 says the server got 27% more…",
  "key_points": [
    "Server cost increased by 27% without any changes",
    "Decrease of 11% observed after initial cost rise",
    "Timing factors like processes and OS scheduling affect costs"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}