On October 31, 2026, the cheapest Gemini 3.1 Pro Preview API we found is UberLLM: buyers paid a median of $0.62 per million input tokens and $3.72 per million output tokens over the last 24 hours. That is at least 69% less on both input and output than the closest other provider we checked, OpenRouter ($2.00 and $12.00). Vercel AI Gateway and Requesty are higher still. 80 sellers on the UberLLM market can serve it. UberLLM adds no fee to these prices, and a request that fails is not billed.
Prices as of October 31, 2026, 18:00 UTC. This page is rebuilt every hour.
How do I call Gemini 3.1 Pro Preview through UberLLM?
Use the OpenAI SDK or any OpenAI-compatible client: set the base URL to the UberLLM endpoint, use an UberLLM API key and set the model to "google/gemini-3.1-pro-preview". The Anthropic SDK works too, through /v1/messages.
Why is Gemini 3.1 Pro Preview cheaper on UberLLM?
UberLLM is a market: sellers offer Gemini 3.1 Pro Preview capacity below its list price, and each request goes to a seller that can serve it. A request costs what its seller charged, UberLLM adds no fee to it, and every request is listed with its cost in Activity.
Can a request cost more than this price?
Yes, when the lower-priced sellers are busy. Send provider.max_price with the most you will pay per million tokens: the request only goes to sellers at or under it and is never billed above it.
Are there other fees?
UberLLM adds no fee to model prices. A card fee of 5.5% + $0.50 is added when you buy credit. With the 5.5% added, UberLLM's Gemini 3.1 Pro Preview price is still lower than every other provider in the table.