"For 1 million tokens, GPT-5.5 is priced at $5 (input), $0.50 (cached input), and $30 (output). Its predecessor GPT-5.4 charges $2.50 (input), $0.25 (cached input), and $15 (output) per 1 million tokens."
""While GPT‑5.5 is priced higher than GPT‑5.4, it is both more intelligent and much more token efficient," the company said during the rollout."
""Our analysis shows that GPT-5.5 actual costs increased 49 percent to 92 percent," OpenRouter said. "Longer prompts, over 10k tokens, saw costs offset by shorter completions. Shorter prompts, under 10k, experience a higher cost increase where completions did not get shorter.""
"According to an analysis conducted by OpenRouter, GPT-5.5 is anywhere from 50 percent more expensive to nearly twice as expensive, depending on prompt length. The range - 49 percent to 92 percent - factors in the model's token efficiency improvements, which are more relevant for longer prompts."
OpenAI increased pricing for its GPT model family when moving from GPT-5.4 to GPT-5.5, raising per-token costs for both input and output. For 1 million tokens, GPT-5.5 is listed at $5 for input, $0.50 for cached input, and $30 for output, compared with GPT-5.4 at $2.50, $0.25, and $15. OpenAI claims higher intelligence and improved token efficiency reduce the number of tokens needed for results. Independent analysis from OpenRouter estimates actual costs increased by 49% to 92%, varying by prompt length. Longer prompts benefit more from fewer completion tokens, while shorter prompts see larger cost increases. Rival Anthropic faces similar financial pressure, with reported projected losses in 2026.
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