Moonshot's fastest frontier-class model — K3.1 Pro quality at 2–3× the speed, with a 1M-token context, vision, tool use and web search.
curl https://api.venice.ai/api/v1/chat/completions \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "kimi-k3-1-pro-highspeed",
"messages": [{ "role": "user", "content": "Explain quantum tunneling simply." }]
}'Overview
Kimi K3.1 Pro Highspeed is Moonshot AI's high-speed variant of Kimi K3.1 Pro, a 3T-class frontier model released October 23, 2026. It delivers identical quality to K3.1 Pro at roughly 2–3× the speed, with a 1M-token context window, vision input, tool use, web search and always-on reasoning.
On Venice, Kimi K3.1 Pro Highspeed runs under the anonymized privacy tier — your prompts are not stored, profiled, or used for training. You get frontier reasoning and coding without feeding a Big-Tech profile, billed per token with no subscription. Note that this variant is not uncensored, and Venice does not run it in a TEE or with end-to-end encryption — the privacy guarantee is zero retention of prompts.
Agent quickstart
The API is OpenAI-compatible: change the base URL and the model id and existing client code works unchanged.
curl https://api.venice.ai/api/v1/chat/completions \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "kimi-k3-1-pro-highspeed",
"stream": true,
"messages": [{ "role": "user", "content": "Draft the release note." }]
}'curl https://api.venice.ai/api/v1/chat/completions \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "kimi-k3-1-pro-highspeed",
"messages": [{ "role": "user", "content": "Find the rate limits." }],
"tools": [{
"type": "function",
"function": {
"name": "search_docs",
"description": "Search the API documentation.",
"parameters": {
"type": "object",
"properties": { "query": { "type": "string" } },
"required": ["query"]
}
}
}],
"tool_choice": "auto"
}'import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["VENICE_API_KEY"],
base_url="https://api.venice.ai/api/v1",
)
resp = client.chat.completions.create(
model="kimi-k3-1-pro-highspeed",
messages=[{"role": "user", "content": "Build without permission."}],
)
print(resp.choices[0].message.content)Specifications
Assessment
Use cases
Prompting
Leave thinking enabled and set reasoning effort to "low" for quick turns — "max" is the default and burns the most output tokens.
Start a fresh session rather than switching to this model mid-conversation from a K3-series or K2.x session; switching degrades quality and cache hits.
Use Venice's cached input rate ($0.60/1M) by keeping your system prompt and long reference material stable across calls.
Paste whole files or large codebases up to the 1M-token window instead of summarizing — long-context retrieval is one of its edges.
Attach multiple screenshots or diagrams in one request; multi-image input is supported for code review and UI work.
Ask for structured JSON with an explicit schema when building agents — structured output is a first-class capability.
Alternatives
| Model | Best for | Context | Open weights | Price (Venice) |
|---|---|---|---|---|
| Kimi K3.1 Pro Highspeed | Fast frontier coding & agents | 1M tokens | No | $6 in · $30 out / 1M |
| Kimi K3 | Open-weights frontier work | 1M tokens | Yes | $3.75 in · $18.75 out / 1M |
| Gemini 3.8 Flash | Cheap fast general chat | 1M tokens | No | $0.94 in · $4.69 out / 1M |
| Qwen 3.8 Max | Budget long-context reasoning | 1M tokens | No | $2.50 in · $7.50 out / 1M |
Pick Kimi K3.1 Pro Highspeed for interactive frontier coding and agentic runs where latency is felt by a human; drop to Qwen 3.8 Max or Gemini 3.8 Flash when cost dominates, or to Kimi K3 when open weights are non-negotiable.
Pricing
Billed per token on Venice: $6 per 1M input tokens and $30 per 1M output tokens.
New Venice accounts include a free daily allowance and 500 welcome credits — no credit card required.
Getting a key
Create a key in API settings. Nothing else is required to start.
Export it as VENICE_API_KEY so the snippets above run unedited.
Point an existing OpenAI client at https://api.venice.ai/api/v1. The scheme is part of the value: an OpenAI client given a bare host does not resolve it.
Pass kimi-k3-1-pro-highspeed as the model and send the request.
FAQ
Kimi K3.1 Pro Highspeed is Moonshot AI's accelerated variant of Kimi K3.1 Pro, launched October 23, 2026. It offers identical model quality to K3.1 Pro at approximately 2–3× the speed, with a 1M-token context window, vision input, tool use, web search, and always-on reasoning.
Venice bills it per token: $6 per 1M input tokens, $30 per 1M output tokens, and $0.60 per 1M cached input tokens. There is no subscription required — you pay only for what you use.
Not yet. The model launched as proprietary on October 23, 2026, but Moonshot has stated that full model weights will be released by November 4, 2026. Until then it cannot be self-hosted or fine-tuned; Kimi K3 is the open-weights alternative on Venice.
They are the same model with the same quality; Highspeed is simply 2–3× faster. Choose Highspeed for interactive coding or chat where you watch the output arrive, and standard K3.1 Pro for unattended batch or agent runs where latency doesn't matter and the lower rate does.
Yes. It supports function calling / tool use, image input including multiple images per request, structured JSON output, web search, and code-optimized responses — the full agentic stack.
No. The K3.1 Pro series only supports thinking mode, with reasoning levels of low, high, and max — max is the default. Requests that disable thinking are rejected, so budget for reasoning tokens in your output costs.
Venice runs it under the anonymized privacy tier: prompts are not stored, profiled, or used for training. Note that this model is not run in a trusted execution environment and the traffic is not end-to-end encrypted — the guarantee is zero retention of your prompts.
1,000K tokens (1 million), with up to 128K tokens of output per response — enough for entire codebases, long financial documents, or multi-hour agent transcripts in a single context.
One key, free to start, no credit card.