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Moonshot AI

Kimi K3

Multimodal Kimi model with 1M context and toggleable max-effort thinking for long-horizon agent work

Released
Jul 16 2026
Modality
Text + Image + Video
Context
1M tokens
Price in / cached input / out
$2.85 / $0.28 / $14.25per 1M tokens

Quickstart

OpenAI-compatible: change the base URL, and the setup is complete.

from openai import OpenAI
import os

client = OpenAI(
    base_url="https://api.you.com/v1",
    api_key=os.environ["YOU_API_KEY"],
)

response = client.chat.completions.create(
    model="kimi-k3",
    messages=[{"role": "user", "content": "Summarize this support ticket in two sentences."}],
)

print(response.choices[0].message.content)

Specifications

Technical details, capabilities, pricing, and data handling.

Model info

Input Modality
Text, Image, Video
Output Modality
Text
Context Window
1M
Parameters
2.8T total / 104B active
License
Kimi K3 License

Capabilities

Reasoning
Supported
Function calling
Supported
Structured outputs
Not supported
Web search grounding
Available with You.com Search

Pricing

Input
$2.85
Cached input
$0.28
Output
$14.25

Data handling

Zero data retention
Supported
No training on customer data
Supported
Regions
US

Providers

Access models through multiple providers with automatic routing and built-in failover.

Providers serving Kimi K3
ProviderZDRNo trainingRegion
You InferenceYesYes
US
ParasailYesYes
US
WaferYesYes
US

When to use Kimi K3

Guidance based on the specifications and benchmarks on this page.

Best for

  • Long-horizon autonomous codingSustains long engineering sessions with minimal oversight, navigating large repositories and orchestrating terminal tools.
  • Agentic research and knowledge workBuilt for end-to-end knowledge work such as deep research, dashboards, and multi-step tool use.
  • Vision-in-the-loop developmentNative image understanding lets it iterate between code and screenshots for frontend, game development, and CAD work.
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Consider alternatives for

  • You need peak frontier qualityMoonshot says K3's overall performance still trails the most powerful proprietary models.
  • You need low-cost, high-volume inferenceSmaller models such as DeepSeek V4.1 Flash or GPT-OSS 120B fit simple, high-volume workloads at lower cost.
  • You need audio input or outputKimi K3 handles text, images, and video; audio is not a supported modality.

Benchmarks

Kimi K3 results alongside comparable models

Reasoning benchmark scores
BenchmarkKimi K3Moonshot AIQwen3.8 MaxAlibabaDeepSeek V4 ProDeepSeekDeepSeek V4.1 FlashDeepSeekGLM 5.3Z.aiGPT-OSS 120BOpenAI
GPQA Diamond93.5%92.6%90.1%90.9%Not evaluated80.1%
Humanity's Last Exam43.5%43.6%37.7%36.8%Not evaluated14.9%
Humanity's Last Exam (with tools)56%56.2%48.2%63.9%62.5%19%

Scores are self-reported by each model’s developer, so settings may vary between models. Sources: Kimi K3 (Hugging Face), Qwen3.8 Max (Hugging Face), Qwen3.8 Max (release post), DeepSeek V4 Pro (Hugging Face), DeepSeek V4.1 Flash (Hugging Face), GLM 5.3 (Hugging Face), GPT-OSS 120B (model card).

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