Kimi K3 vs GPT-5.5 Pro
moonshotai/kimi-k3 · openai/gpt-5.5-pro
As of October 31, 2026, Kimi K3 is the cheaper API on UberLLM: $0.0032 per million input tokens and $0.2475 per million output, versus $24.30 / $145.80 for GPT-5.5 Pro, about 100% less when output is 3 tokens for every input token. These are the median prices buyers paid over the last 24 hours. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose Kimi K3 to cut cost; choose GPT-5.5 Pro when its capabilities fit your task better.
Kimi K3 vs GPT-5.5 Pro, side by side
| Spec | Kimi K3 | GPT-5.5 Pro |
|---|---|---|
| Price · input / 1M | $0.0032 | $24.30 |
| Price · output / 1M | $0.2475 | $145.80 |
| Context length | 1,000,000 | 1,000,000 |
| Max output tokens | 131,072 | 128,000 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 98% off | 19% off |
| First token, median (7 days) | 2.9 s (937 requests) | — |
Median prices buyers paid on UberLLM over the last 24 hours. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated October 31, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Kimi K3 vs GPT-5.5 Pro — FAQ
Is Kimi K3 or GPT-5.5 Pro cheaper?
Kimi K3 is cheaper on a blended token mix, by about 100%. 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 Kimi K3 and GPT-5.5 Pro?
Kimi K3: $0.0032 in / $0.2475 out per 1M tokens. GPT-5.5 Pro: $24.30 in / $145.80 out per 1M tokens. That's roughly a 100% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Kimi K3 and GPT-5.5 Pro 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.