Kimi K3 vs Grok 4.20 Multi-Agent Beta
moonshotai/kimi-k3 · x-ai/grok-4.20-multi-agent-beta
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 $0.6219 / $1.24 for Grok 4.20 Multi-Agent Beta, about 83% 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 Grok 4.20 Multi-Agent Beta when context size wins. Grok 4.20 Multi-Agent Beta carries the larger context window (2,000,000 vs 1,000,000 tokens), which can matter for long-document work.
Kimi K3 vs Grok 4.20 Multi-Agent Beta, side by side
| Spec | Kimi K3 | Grok 4.20 Multi-Agent Beta |
|---|---|---|
| Price · input / 1M | $0.0032 | $0.6219 |
| Price · output / 1M | $0.2475 | $1.24 |
| Context length | 1,000,000 | 2,000,000 |
| Max output tokens | 131,072 | 128,000 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | — |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 98% off | 50% 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 Grok 4.20 Multi-Agent Beta — FAQ
Is Kimi K3 or Grok 4.20 Multi-Agent Beta cheaper?
Kimi K3 is cheaper on a blended token mix, by about 83%. 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 4.20 Multi-Agent Beta?
Kimi K3: $0.0032 in / $0.2475 out per 1M tokens. Grok 4.20 Multi-Agent Beta: $0.6219 in / $1.24 out per 1M tokens. That's roughly a 83% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Kimi K3 and Grok 4.20 Multi-Agent Beta 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.