Gemini 3.1 Pro vs Kimi K3 Fast
google/gemini-3.1-pro · moonshotai/kimi-k3-fast-api
As of November 5, 2026, Gemini 3.1 Pro is the cheaper API on UberLLM: $0.2600 per million input tokens and $1.56 per million output, versus $3.55 / $17.77 for Kimi K3 Fast, about 91% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose Gemini 3.1 Pro to cut cost; choose Kimi K3 Fast when its capabilities fit your task better.
Gemini 3.1 Pro vs Kimi K3 Fast, side by side
| Spec | Gemini 3.1 Pro | Kimi K3 Fast |
|---|---|---|
| Price · input / 1M | $0.2600 | $3.55 |
| Price · output / 1M | $1.56 | $17.77 |
| Context length | 1,048,576 | 1,000,000 |
| Max output tokens | 65,536 | 131,072 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | — | 21% off |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 5, 2026.
Gemini 3.1 Pro vs Kimi K3 Fast — FAQ
Is Gemini 3.1 Pro or Kimi K3 Fast cheaper?
Gemini 3.1 Pro is cheaper on a blended token mix, by about 91%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between Gemini 3.1 Pro and Kimi K3 Fast?
Gemini 3.1 Pro: $0.2600 in / $1.56 out per 1M tokens. Kimi K3 Fast: $3.55 in / $17.77 out per 1M tokens. That's roughly a 91% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Gemini 3.1 Pro and Kimi K3 Fast with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.