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liquid · Open weights

LFM2.5 2.6B

Added Aug 12, 2026Open weights

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Use in the app

Liquid AI's compact 2.6B reasoning model for agent workflows, data extraction, RAG, and long-context processing. It supports tool calling and structured output, but Liquid advises against using it for agentic coding. Warning: prompts and responses may be logged and used for model training or service improvement; do not send sensitive data.

  • Reasoning
  • Tools
  • Structured output
Input
Text
Output
Text
Reasoning effort
minimal · low · medium · high · xhigh
Discovery tier
Open weights

Pricing

USD per 1M tokens
Input
$0.10
Output
$0.20

Reference prices as published by the model provider. API example

Specifications

Context window
128K
Max output
32.8K
Average output (7 days)
459 tokens
Longer than 45% of 465 models

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TryGLM 4.6VGPT-4oQwen 3 235b A22BAll 3

Public evaluations

Benchmarks

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

Intelligence Index

8.4

Better than 13% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    7.7

    Composite of the coding evaluations

    Better than 3% of 168 scored models

Document reasoning

  • AA-LCRv1.1

    5.7%

    Reasoning across long documents

    Better than 3% of 309 scored models

Reasoning and knowledge

  • Humanity’s Last Exam

    6.2%

    Expert-level questions across academic fields

    Better than 21% of 323 scored models

  • GPQA Diamond

    55.8%

    Graduate-level science questions

    Better than 13% of 291 scored models

Coding

  • SciCode

    14.4%

    Scientific computing in Python

    Better than 0% of 174 scored models

Legacy evaluations

  • AA-LCR (unversioned)

    5.7%

    Long-context reasoning, earlier grading

    Better than 3% of 309 scored models

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": "liquid/lfm-2.5-2.6b",
    "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="liquid/lfm-2.5-2.6b",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

liquid

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