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GPT-5.5 Price Increase: What It Actually Costs

OpenRouter analyzed the real cost impact of GPT-5.5 compared to GPT-5.4. By examining usage data from users who switched models, they found cost increases between 49% and 92%, but longer prompts (over 10K tokens) saw 19-34% fewer completion tokens, partially offsetting the price hike. Shorter prompts faced larger cost increases.

SourceHacker News AIAuthor: gmays
GPT-5.5 Price Increase: What It Actually Costs
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Summary only

Under the source content permission, this page provides an editorial summary, key points, and a link to the original article.

Key points and analysis

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EngineersIntermediate

Key points

  • GPT-5.5 doubled input and output token prices but generates shorter completions.
  • For prompts over 10K tokens, completions shrank 19-34%, limiting cost increases to 49-85%.
  • Shorter prompts under 10K tokens saw cost surges of 69-92%.
  • Analysis used a before-and-after comparison of the same user cohort.

Highlights and analysis are generated automatically and may contain errors. Check the original source.

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