GPT-5.5 API Pricing & Cost Calculator
GPT-5.5 is a premium flagship model. Use its 90% prompt caching and 50% batch discounts to significantly lower operational costs in high-volume production environments.
GPT-5.5 represents the pinnacle of OpenAI's intelligence, delivering cutting-edge reasoning and tool-use capabilities. Understanding its cost structure is essential for running it at scale.
By TechCompare · Updated
Calculator
Cost Comparison
Based on 100,000 input tokens (50% cached), 5,000 output tokens, and 100 requests.
How this is calculated
GPT-5.5 is priced at $5.00 per million input tokens and $30.00 per million output tokens, supporting a 90% caching discount ($0.50 per million) and a 50% batch discount ($2.50 per million inputs, $15.00 per million outputs).
Verdict
The headline rates are $5.00/M input and $30.00/M output, so a typical 100K input + 5K output call runs about $0.65 before discounts. The two cost levers pull that down fast: a 90% cache hit drops input to $0.50/M, which on a stable system prompt reused 100K times a day cuts roughly $1,500 of daily input cost down to $150, and the 50% batch discount halves both rows ($2.50/M input, $15.00/M output) for overnight bulk runs. Those economics only make sense when the task genuinely needs GPT-5.5's frontier reasoning. For routine chat and RAG, route to a cheaper workhorse and reserve it for the hardest calls.
More API Standalones scenarios
Related guides
Frequently asked questions
Does GPT-5.5 support prompt caching?
How much does GPT-5.5 cost per million output tokens?
Is GPT-5.5 worth the premium over GPT-5.4?
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