GPT-5.5 costs 49 to 92 percent more than its predecessor, depending on the input length

OpenAI doubled GPT-5.5's list price compared to GPT-5.4, claiming shorter responses would offset the increase. An OpenRouter analysis of real usage data tells a different story: actual costs rose 49 to 92 percent depending on input length. Anthropic hiked Opus 4.7 prices too—and with both companies