On blended cost, Google: Gemini 3.1 Pro Preview Custom Tools ($4.50/M) is about 93% cheaper than OpenAI: GPT-5.5 Pro ($67.50/M) per 1M tokens. Google: Gemini 3.1 Pro Preview Custom Tools wins on input price, Google: Gemini 3.1 Pro Preview Custom Tools on output, and OpenAI: GPT-5.5 Pro has the larger context window.
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Frequently asked questions
- Is OpenAI: GPT-5.5 Pro or Google: Gemini 3.1 Pro Preview Custom Tools cheaper?
- On a blended basis Google: Gemini 3.1 Pro Preview Custom Tools is cheaper at $4.50/M per 1M tokens versus $67.50/M for OpenAI: GPT-5.5 Pro — about 93% less. Blended weights input 3:1 over output.
- OpenAI: GPT-5.5 Pro vs Google: Gemini 3.1 Pro Preview Custom Tools: input token cost?
- OpenAI: GPT-5.5 Pro charges $30.00/M per 1M input tokens; Google: Gemini 3.1 Pro Preview Custom Tools charges $2.00/M. Google: Gemini 3.1 Pro Preview Custom Tools is cheaper on input.
- OpenAI: GPT-5.5 Pro vs Google: Gemini 3.1 Pro Preview Custom Tools: output token cost?
- OpenAI: GPT-5.5 Pro charges $180/M per 1M output tokens; Google: Gemini 3.1 Pro Preview Custom Tools charges $12.00/M. Google: Gemini 3.1 Pro Preview Custom Tools is cheaper on output.
- Which has the larger context window, OpenAI: GPT-5.5 Pro or Google: Gemini 3.1 Pro Preview Custom Tools?
- OpenAI: GPT-5.5 Pro supports 1,050,000 tokens and Google: Gemini 3.1 Pro Preview Custom Tools supports 1,048,576 tokens, so OpenAI: GPT-5.5 Pro handles longer inputs in a single call.
- How do I track OpenAI: GPT-5.5 Pro and Google: Gemini 3.1 Pro Preview Custom Tools price changes?
- Token Price Index Pro ($9/mo) emails you the instant either model changes price, so a hike never catches you out.
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