GPT-5.5 Price Increase: What It Costs
10 hours ago
- #GPT-5.5
- #Cost Analysis
- #AI Pricing
- GPT-5.5 launched with a 2x price increase over GPT-5.4, with input tokens rising from $2.50/M to $5.00/M and output tokens from $15/M to $30/M.
- Analysis using a 'switcher cohort' of users who shifted from GPT-5.4 to GPT-5.5 showed cost increases between 49% and 92%, depending on prompt size.
- GPT-5.5 is less verbose for longer prompts (over 10K tokens), producing 19-34% fewer completion tokens, which partially offsets the price hike.
- For shorter prompts (under 10K tokens), completion lengths increased or stayed similar, leading to higher cost increases, up to 92% for the smallest prompts.
- Methodology involved OpenRouter's request logs, focusing on text-only, non-cancelled requests, with consistent token counts and normalization to cost per million tokens.