---
id: "aion-labs/aion-3.5"
also: ["aion-labs/aion-3.5-20260923"]
card_usd_per_m: "3.0 in, 6.0 out, at aion-labs"
cheapest_list_usd_per_m: "3.0 in, 6.0 out, at aion-labs on openrouter"
cheapest_effective_usd_per_m: "1.3474 in, 6.0 out, at aion-labs on openrouter"
context: 262144
max_output: 32768
input: ["text"]
output: ["text"]
released: "2026-09-23"
reasoning: ["max", "high", "low"]
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["include_reasoning", "max_tokens", "reasoning", "reasoning_effort", "response_format", "temperature", "tool_choice", "tools", "top_p"]
endpoints: 1
gateways: "openrouter (1)"
no_training: 1
trains: 0
retains_prompts: 1
---
# AionLabs: Aion 3.5

Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. It uses a collaborative generation process in which multiple specialized models each...