aionlabs · Frontier

AionLabs: Aion 3.5

Added Sep 23, 2026

A GLM-family collaborative generation model tuned for immersive roleplay and storytelling, with stronger narrative structure, tension, conflict, and nuanced mature themes.

Reasoning
Tools

Input: Text
Output: Text
Discovery tier: Frontier

Pricing

USD per 1M tokens

Input: $3.00
Output: $6.00
Cache read: $0.75

Reference prices as published by the model provider. API example

Specifications

Context window: 262.1K
Max output: 32.8K
Average output (7 days): 1.4K tokens; Longer than 82% of 473 models

Side by side

Compare models

Put AionLabs: Aion 3.5 next to up to three other models. The comparison stays in the link, so you can share it.

TryEmber 1 Abliterated Model Large V2 Claude Sonnet 4.6 All 3

Public evaluations

Benchmarks

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

#19Roleplay18.5%
#15Creative writing20.1%

Ranks among Noumen catalog models on Use cases leaderboards. Only top-20 placements are listed.

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: 65.5 tok/s; Faster than 44% of 259 models
Time to first token: 4.2 s; Quicker than 36% of 259 models
Prompt cache hits: 43.2%; About $2.03 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 96.8%

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": "aion-labs/aion-3.5",
    "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="aion-labs/aion-3.5",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

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