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MiMo V2.6 Pro UltraSpeed

Added Sep 21, 2026Open weights

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Use in the app

MiMo V2.6 Pro UltraSpeed is the latency-optimized serving mode for Xiaomi's flagship MiMo V2.6 Pro checkpoint. It preserves Pro-level quality while delivering up to 20x faster output for real-time coding, interactive agents, and other latency-sensitive workflows, with native text, image, video, and audio understanding and a 1M-token context window.

  • Reasoning
  • Tools
  • Vision
  • Structured output
  • Audio input
  • Video input
Input
Text, Images, Video, Audio
Output
Text
Reasoning effort
none · high
Discovery tier
Open weights

Pricing

USD per 1M tokens
Input
$4.35
Output
$8.70
Cache read
$0.036
Cache write
$0.00

Reference prices as published by the model provider. API example

Specifications

Context window
1M
Max output
131.1K
Average output (7 days)
1K tokens
Longer than 70% of 468 models

Side by side

MiMo V2.6 Pro UltraSpeed compared

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

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MiMo V2.6 Pro UltraSpeedxiaomiThis modelGPT 5.6 SolOpenAIRemove
ProviderxiaomiOpenAI
Discovery tierOpen weightsFrontier
AddedSep 21, 2026Jul 9, 2026
Limits
Context window1.05M1.05MBest
Max output131.07KBest128K
Average output1K tokens576 tokens
Pricing, USD per 1M tokens
Input$4.35$2.00Best
Output$8.70Best$10.00
Cache read$0.036Best$0.20
Cache write$0.00Best$2.50
Performance
Throughput263.0 tok/sBest79.4 tok/s
Time to first token11.1 sBest30.8 s
Request success (24h)100.0%100.0%
Benchmark indexes
Intelligence Index46.347.0Best
Coding Index—77.4
Capabilities
ReasoningYesYes
ToolsYesYes
VisionYesYes
Structured outputYesYes
PDF inputNoYes
Audio inputYesNo
Video inputYesNo
Reasoning effortnone, highnone, low, medium, high, xhigh, max

Public evaluations

Benchmarks

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

  • MiMo V2.6 Pro UltraSpeed
  • GPT 5.6 Sol

Intelligence Index

  • MiMo V2.6 Pro UltraSpeed46.3
  • GPT 5.6 Sol47.0

MiMo V2.6 Pro UltraSpeed: Better than 92% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    Composite of the coding evaluations

    • MiMo V2.6 Pro UltraSpeed: —
    • GPT 5.6 Sol: 77.4

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • MiMo V2.6 Pro UltraSpeed: 58.6%
    • GPT 5.6 Sol: 60.1%Top

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • MiMo V2.6 Pro UltraSpeed: 25.4%
    • GPT 5.6 Sol: 30.3%Top

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • MiMo V2.6 Pro UltraSpeed: 1,512 EloTop
    • GPT 5.6 Sol: 1,479 Elo

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • MiMo V2.6 Pro UltraSpeed: 1,683 EloTop
    • GPT 5.6 Sol: 1,609 Elo

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • MiMo V2.6 Pro UltraSpeed: 19.2%
    • GPT 5.6 Sol: 27.2%Top

  • AA-LCRv1.1

    Reasoning across long documents

    • MiMo V2.6 Pro UltraSpeed: 86.3%Top
    • GPT 5.6 Sol: 84.0%

  • MLCR-AA

    Long-context reasoning over medical records

    • MiMo V2.6 Pro UltraSpeed: 12.8%
    • GPT 5.6 Sol: 30.0%Top

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • MiMo V2.6 Pro UltraSpeed: 49.4%
    • GPT 5.6 Sol: 49.5%Top

  • GPQA Diamond

    Graduate-level science questions

    • MiMo V2.6 Pro UltraSpeed: —
    • GPT 5.6 Sol: 94.1%

  • IFBench

    Following precise output instructions

    • MiMo V2.6 Pro UltraSpeed: —
    • GPT 5.6 Sol: 72.7%

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • MiMo V2.6 Pro UltraSpeed: 34.8%
    • GPT 5.6 Sol: 39.9%Top

  • SciCode

    Scientific computing in Python

    • MiMo V2.6 Pro UltraSpeed: 60.9%Top
    • GPT 5.6 Sol: 57.1%

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • MiMo V2.6 Pro UltraSpeed: —
    • GPT 5.6 Sol: 65.9%

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • MiMo V2.6 Pro UltraSpeed: —
    • GPT 5.6 Sol: 85.1%

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • MiMo V2.6 Pro UltraSpeed: 86.3%Top
    • GPT 5.6 Sol: 84.0%

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

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Throughput
263.0 tok/s
Faster than 91% of 254 models
Time to first token
11.1 s
Quicker than 7% of 254 models
Prompt cache hits
67.0%
About $1.46 per 1M input tokens with caching
Request success (24h)
100.0%
Reliable

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Hourly request success · last 72 hoursLowest hour 100.0%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

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": "xiaomi/mimo-v2.6-pro-ultraspeed",
    "reasoning_effort": "none",
    "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="xiaomi/mimo-v2.6-pro-ultraspeed",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

xiaomi

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