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Moonshot · Open weights

Kimi K2 0711 Fast

Added Dec 15, 2025Open weights

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Use in the app

Deprecated. This model now routes to Kimi K2 0711.

  • PDF input
Input
Text
Output
Text
Discovery tier
Open weights

Pricing

USD per 1M tokens
Input
$0.40
Output
$1.80

Reference prices as published by the model provider. API example

Specifications

Context window
131.1K
Max output
16.4K

Side by side

Kimi K2 0711 Fast compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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Kimi K2 0711 FastMoonshotThis modelKimi K3 TEEMoonshotRemove
ProviderMoonshotMoonshot
Discovery tierOpen weightsOpen weights
AddedDec 15, 2025Jul 31, 2026
Limits
Context window131.07K1.05MBest
Max output16.38K65.54KBest
Average output—1.1K tokens
Pricing, USD per 1M tokens
Input$0.40Best$3.00
Output$1.80Best$15.00
Cache read—$1.50
Performance
Throughput—31.7 tok/s
Time to first token—5.0 s
Request success (24h)—98.0%
Benchmark indexes
Intelligence Index12.743.6Best
Coding Index—76.2
Math Index57.0—
Capabilities
ReasoningNoYes
ToolsNoYes
VisionNoYes
Structured outputNoYes
PDF inputYesNo
Reasoning effort—low, high, max

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • Kimi K2 0711 Fast
  • Kimi K3 TEE

Intelligence Index

  • Kimi K2 0711 Fast12.7
  • Kimi K3 TEE43.6

Kimi K2 0711 Fast: Better than 28% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    Composite of the coding evaluations

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 76.2

  • Math Index

    Composite of the math evaluations

    • Kimi K2 0711 Fast: 57.0
    • Kimi K3 TEE: —

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 58.3%

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 24.8%

  • Harvey LAB-AAv1.1

    Legal tasks passed in full, with no material hallucination

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 5.3%

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 1,499 Elo

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 1,534 Elo

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 22.0%

  • AA-LCRv1.1

    Reasoning across long documents

    • Kimi K2 0711 Fast: 53.0%
    • Kimi K3 TEE: 88.7%Top

  • MLCR-AA

    Long-context reasoning over medical records

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 21.7%

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • Kimi K2 0711 Fast: 7.4%
    • Kimi K3 TEE: 46.9%Top

  • GPQA Diamond

    Graduate-level science questions

    • Kimi K2 0711 Fast: 76.6%
    • Kimi K3 TEE: 93.5%Top

  • MMLU-Pro

    Multi-subject knowledge and reasoning

    • Kimi K2 0711 Fast: 82.4%
    • Kimi K3 TEE: —

  • IFBench

    Following precise output instructions

    • Kimi K2 0711 Fast: 41.5%
    • Kimi K3 TEE: —

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 12.6%

  • SciCode

    Scientific computing in Python

    • Kimi K2 0711 Fast: —
    • Kimi K3 TEE: 59.5%

  • LiveCodeBench

    Recent competitive programming problems

    • Kimi K2 0711 Fast: 55.6%
    • Kimi K3 TEE: —

Math

  • AIME 2025

    Competition mathematics, 2025 problems

    • Kimi K2 0711 Fast: 57.0%
    • Kimi K3 TEE: —

  • AIME

    Competition mathematics

    • Kimi K2 0711 Fast: 69.3%
    • Kimi K3 TEE: —

  • MATH-500

    Competition math problems

    • Kimi K2 0711 Fast: 97.1%
    • Kimi K3 TEE: —

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • Kimi K2 0711 Fast: 15.9%
    • Kimi K3 TEE: —

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • Kimi K2 0711 Fast: 61.1%
    • Kimi K3 TEE: —

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • Kimi K2 0711 Fast: 53.0%
    • Kimi K3 TEE: 88.7%Top

Scores from Artificial Analysis, updated Oct 26, 2026. Artificial Analysis

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kimi-k2-instruct-fast",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="kimi-k2-instruct-fast",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

Moonshot

Other Moonshot models, starting with the same family.