Kimi K3 vs Grok 4.3
moonshotai/kimi-k3 · x-ai/grok-4.3
As of November 7, 2026, Grok 4.3 is the cheaper API on UberLLM: $0.0124 per million input tokens and $0.0248 per million output, versus $0.0013 / $0.1072 for Kimi K3, about 73% 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 Grok 4.3 to cut cost; choose Kimi K3 when its capabilities fit your task better.
Kimi K3 vs Grok 4.3, side by side
| Spec | Kimi K3 | Grok 4.3 |
|---|---|---|
| Price · input / 1M | $0.0013 | $0.0124 |
| Price · output / 1M | $0.1072 | $0.0248 |
| 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 | 99.3% off | 99% off |
| First token, median (7 days) | 7.4 s (1,829 requests) | — |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 7, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Kimi K3 vs Grok 4.3 — FAQ
Is Kimi K3 or Grok 4.3 cheaper?
Grok 4.3 is cheaper on a blended token mix, by about 73%. 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 Grok 4.3?
Kimi K3: $0.0013 in / $0.1072 out per 1M tokens. Grok 4.3: $0.0124 in / $0.0248 out per 1M tokens. That's roughly a 73% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Kimi K3 and Grok 4.3 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.