For 10,000 requests of 2,000 tokens in and 500 out, Kimi K3.1 Pro costs 37% less than Kimi K3 on Zurelay: $36.00 against $57.25. Both are below their labs' list prices: 60% for Kimi K3.1 Pro and 58% for Kimi K3.
Side by side
| Kimi K3.1 Pro | Kimi K3 | |
|---|---|---|
| Lab | Moonshot AI | Moonshot AI |
| Released | Oct 24, 2026 | Jul 16, 2026 |
| Context window | 1M tokens | 1M tokens |
| Max output | 32K tokens | — |
| Reads | Text, Images | Text, Images |
| Reasoning levels | low, high, max | low, high, max |
| Price per 1M, in / out | $0.80 / $4.00 | $1.27 / $6.37 |
| Lab list price | $2.00 / $10.00 | $3.00 / $15.00 |
| Cached input per 1M | $0.08 | $0.127 |
| 10K typical requests | $36.00 | $57.25 |
Prices in US dollars per 1M tokens on Zurelay, live from the catalog. A typical request is 2,000 tokens in and 500 out. Output limits are each lab's.
What they're for
Kimi K3.1 Pro is Moonshot AI's newest flagship and the first model of its K3.1 series: Kimi K3 trained much further with reinforcement learning, with native vision and a 1M-token context window. The Zurelay Kimi K3.1 Pro API serves the same model through one OpenAI-compatible endpoint at 60% below Moonshot's list price.
Kimi K3 is Moonshot AI's flagship model: 2.8 trillion parameters, native vision and a 1M-token context window, built for long-horizon coding and knowledge work. The Zurelay Kimi K3 API serves the same model through one OpenAI-compatible endpoint at 58% below Moonshot's list price.
Try both
Specs don't say which model handles your work better. Send the same requests to both and compare the answers, the tokens and the bill. On Zurelay that's a change of model name.
To price a whole month, use the LLM cost calculator.
from openai import OpenAIclient = OpenAI(base_url="https://api.zurelay.com/v1", api_key="YOUR_ZURELAY_KEY")prompt = [{"role": "user", "content": "Summarize this contract: ..."}]# Same key, same code: only the model name changesfor model in ["kimi-k3.1-pro", "kimi-k3"]: reply = client.chat.completions.create(model=model, messages=prompt) print(model, reply.usage.total_tokens, reply.choices[0].message.content[:200])For 10,000 requests of 2,000 tokens in and 500 out, Kimi K3.1 Pro costs 37% less than Kimi K3 on Zurelay: $36.00 against $57.25. Per 1M tokens, Kimi K3.1 Pro is $0.80 input and $4.00 output, and Kimi K3 is $1.27 and $6.37.
They're the same on Zurelay: 1M tokens each.
Yes. One Zurelay key calls both. With an OpenAI SDK, point it at https://api.zurelay.com/v1 and change only the model name, kimi-k3.1-pro or kimi-k3, to switch.
Yes. Each model is served over several routes run by independent sellers, and every route is tested before it serves requests and every day after, with identity, dated-knowledge and reasoning checks that catch an older or different model sold under the name you asked for.
Create a key in seconds, point the SDK you already use at Zurelay, and every request costs up to 90% less from the first token.