Aion 3.5 API: Pricing and Specs

Aion 3.5 API

Aion 3.5 is a large language model by Aion Labs, available on the Venice API as aion-labs-aion-3-5. Requests are anonymized, so the provider never sees your identity.Aion 3.5, the successor to Aion 3.0, is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models, with a longer context window. Multiple specialized models collaborate on each response to produce stronger narrative structure and more compelling tension and conflict. It handles mature and darker themes with nuance and supports tool calling for richer interactive fiction.

Aion 3.5 API pricing

Model ID	Variant	Privacy	Price
`aion-labs-aion-3-5`	Standard	Anonymized	$3.75 / $7.50 per 1M

Aion 3.5 specifications

Spec	Value
Provider	Aion Labs
Released	Sep 23, 2026
Privacy	Anonymized
Status	Stable
Context window	256K tokens
Max output	32K tokens
Reasoning effort	Not adjustable

How to use the Aion 3.5 API

Send requests to POST https://api.venice.ai/api/v1/chat/completions with "model": "aion-labs-aion-3-5" and your API key.

curl https://api.venice.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "aion-labs-aion-3-5",
    "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }]
  }'

Related models

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GPT-5.6 Terra Pro API: $2.00 / $12.00 per 1M
GPT-6 Sol API: $2.00 / $10.00 per 1M

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Aion 3.5 API