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inclusionai · Open weights

Ling 3.1 Flash

Added Sep 30, 2026Open weights

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Use in the app

Ling 3.1 Flash is inclusionAI's hybrid reasoning model for coding, tool use, planning, and long-context agent workflows. It has 560B total parameters with 25B active parameters per token. Thinking is enabled by default and can be turned off in settings.

  • Reasoning
  • Tools
  • Structured output
Input
Text
Output
Text
Reasoning effort
none · low · medium · high
Discovery tier
Open weights

Pricing

USD per 1M tokens
Input
$0.075
Output
$0.22
Cache read
$0.015

Reference prices as published by the model provider. API example

Specifications

Context window
262.1K
Max output
32.8K
Average output (7 days)
7.8K tokens
Longer than 99% of 465 models

Side by side

Ling 3.1 Flash compared

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

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Ling 3.1 FlashinclusionaiThis modelLing 3.0 FlashinclusionaiRemove
Providerinclusionaiinclusionai
Discovery tierOpen weightsEfficient
AddedSep 30, 2026Jul 23, 2026
Limits
Context window262.14K262.14K
Max output32.77K32.77K
Average output7.8K tokens1.1K tokens
Pricing, USD per 1M tokens
Input$0.075$0.075
Output$0.22$0.22
Cache read$0.015$0.015
Performance
Throughput86.1 tok/s299.6 tok/sBest
Time to first token2.7 s1.9 sBest
Request success (24h)100.0%Best99.8%
Benchmark indexes
Intelligence Index41.1Best20.1
Coding Index—50.6
Capabilities
ReasoningYesNo
ToolsYesYes
Structured outputYesNo
Reasoning effortnone, low, medium, high—

Public evaluations

Benchmarks

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

  • Ling 3.1 Flash
  • Ling 3.0 Flash

Intelligence Index

  • Ling 3.1 Flash41.1
  • Ling 3.0 Flash20.1

Ling 3.1 Flash: Better than 86% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    Composite of the coding evaluations

    • Ling 3.1 Flash: —
    • Ling 3.0 Flash: 50.6

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • Ling 3.1 Flash: 61.7%Top
    • Ling 3.0 Flash: 3.2%

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • Ling 3.1 Flash: 23.6%Top
    • Ling 3.0 Flash: 0.6%

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • Ling 3.1 Flash: 1,397 EloTop
    • Ling 3.0 Flash: 798 Elo

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • Ling 3.1 Flash: 1,617 EloTop
    • Ling 3.0 Flash: 948 Elo

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • Ling 3.1 Flash: 10.0%Top
    • Ling 3.0 Flash: 5.4%

  • AA-LCRv1.1

    Reasoning across long documents

    • Ling 3.1 Flash: 83.0%Top
    • Ling 3.0 Flash: 73.0%

  • MLCR-AA

    Long-context reasoning over medical records

    • Ling 3.1 Flash: 12.2%Top
    • Ling 3.0 Flash: 5.0%

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • Ling 3.1 Flash: 39.4%Top
    • Ling 3.0 Flash: 23.7%

  • GPQA Diamond

    Graduate-level science questions

    • Ling 3.1 Flash: —
    • Ling 3.0 Flash: 85.5%

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • Ling 3.1 Flash: 33.3%Top
    • Ling 3.0 Flash: 0.0%

  • SciCode

    Scientific computing in Python

    • Ling 3.1 Flash: 54.1%Top
    • Ling 3.0 Flash: 42.0%

Legacy evaluations

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • Ling 3.1 Flash: 83.0%Top
    • Ling 3.0 Flash: 73.0%

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
86.1 tok/s
Faster than 57% of 250 models
Time to first token
2.7 s
Quicker than 63% of 250 models
Prompt cache hits
94.4%
About $0.0183 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 88.3%
  • 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": "inclusionai/ling-3.1-flash",
    "reasoning_effort": "medium",
    "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="inclusionai/ling-3.1-flash",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

inclusionai

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