13%Kimi K3 Fast API
Moonshot AI·Vision· 100.0% success (7d)
Pricing
Cheapest live price, per 1 million tokens.
Input / 1M tokens
OpenRouter $4.50
Output / 1M tokens
OpenRouter $22.50
Cache read / 1M
Repeated prompt prefixes
Cache read is the discounted rate for repeated prompt prefixes (system prompts, agent context).
Capabilities · 8
Specifications
- Context window
- 1M
- Max output
- 131K
- Type
- Vision
- Creator
- Moonshot AI
- Live sellers
- 13
- Requests / 24h
- 233
Price history · 60 days
Estimated monthly cost
30 days at the cheapest live price.
Quick start
OpenAI-compatible — change the base URL and key. Get a key from the dashboard.
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="YOUR_QUBAX_API_KEY",
)
response = client.chat.completions.create(
model="kimi-k3-fast-api",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)About Kimi K3 Fast
Kimi K3 Fast is a multimodal language model developed by Moonshot AI. It's particularly well-suited for analyzing images, screenshots, and visual content, tackling complex, multi-step reasoning problems, orchestrating tool-using agents that call APIs and external services, grounding responses in real-time web search results, producing structured outputs for reliable data extraction and handling large contexts of up to 1M tokens. Its 1M-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. It can write up to 131K tokens in a single response.
As of Oct 28, 2026, Kimi K3 Fast costs $5.06 per 1M input tokens and $25.31 per 1M output tokens on Qubax. A typical 1,000 chat requests (2K tokens in, 500 out) come to about $22.78. Measured availability over the last 7 days: 100.0%. 13 independent compute providers currently serve it, so requests fail over automatically. It handled 233 requests on Qubax in the last 24 hours. Pay with USDC, USDT, BTC, ETH or 350+ other coins — no credit card required.
Similar-priced alternatives
Frequently asked questions
How much does the Kimi K3 Fast API cost?
On Qubax, Kimi K3 Fast costs $5.06 per 1M input tokens and $25.31 per 1M output tokens.
Is the Kimi K3 Fast API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use Kimi K3 Fast as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.
How do I pay for Kimi K3 Fast API usage?
Qubax uses prepaid crypto credits. Top up with USDC, USDT, BTC, ETH, SOL or 350+ other coins and your balance is deducted as you use the API. No credit card or KYC required.
What is the context window of Kimi K3 Fast?
Kimi K3 Fast supports a context window of 1M tokens, allowing you to process large documents, codebases, or long conversations in a single request.
What can I build with Kimi K3 Fast?
You can use Kimi K3 Fast to analyze images and visual content, tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, answer questions with real-time web search, generate structured JSON output for data pipelines and process long documents and entire codebases. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.
How fast and reliable is Kimi K3 Fast on Qubax?
Its 7-day success rate is 100.0%. Responses stream token by token. 13 sellers serve it, so if one is slow or down the request moves to the next.
Kimi K3 Fast vs GPT-5.4 Image 2: which should I choose?
Kimi K3 Fast by Moonshot AI and GPT-5.4 Image 2 by OpenAI are both strong models in a similar price tier. Kimi K3 Fast excels at complex reasoning and supports vision/image inputs. GPT-5.4 Image 2 comes from a different lab and may have different strengths depending on your workload. On Qubax, Kimi K3 Fast starts at $5.06/1M input tokens while GPT-5.4 Image 2 comes in at $3.60/1M, so GPT-5.4 Image 2 may be worth considering if you need to minimize per-token cost. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.
Can I use Kimi K3 Fast for commercial projects?
Yes. Kimi K3 Fast on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
Why use Kimi K3 Fast on Qubax?
Live market prices
Providers compete on price — you get the cheapest healthy seller.
Pay with crypto
350+ coins (BTC, ETH, SOL, USDT, USDC). No card, no KYC.
OpenAI & Anthropic compatible
Drop-in base URL. Works with Cline, Cursor, Claude Code, OpenAI and Anthropic SDKs.