Aion 3.5
FrontierToolsAionLabs · Released September 2026
Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models.
It belongs to AionLabs' Aion line, multi-model storytelling systems offered in full and Mini servings.
Facts and pricing
- Provider
- AionLabs
- Context window
- 262K tokens
- Input price
- 36.0 credits / 1M tokens ($3.00 raw)
- Output price
- 72.0 credits / 1M tokens ($6.00 raw)
- Vision (image input)
- No
- Tool calling
- Yes
- Extended reasoning
- No
Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin. Raw prices shown per 1M tokens.
Try Aion 3.5 now
What Aion 3.5 is best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Long documents: the 262K-token window holds lengthy reports, contracts or papers whole
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Example prompts
Prompts that suit a frontier model like Aion 3.5:
- Review this business plan and give me the three hardest questions an investor would ask
- Rewrite this announcement so it lands with both engineers and executives
- I am choosing between two job offers, help me think through the tradeoffs
- Draft a technical design doc for a rate limiter, including failure modes
AionLabs family
| Model | Context | Input cr/M | Output cr/M | Released |
|---|---|---|---|---|
| Aion 3.5 Mini | 262K | 8.4 | 16.8 | September 2026 |
| Aion 3.5 | 262K | 36.0 | 72.0 | September 2026 |
| Aion-3.0-Mini | 131K | 8.4 | 16.8 | July 2026 |
| Aion-3.0 | 131K | 36.0 | 72.0 | July 2026 |
| Aion-2.0 | 131K | 9.6 | 19.2 | February 2026 |
| Aion-RP 1.0 (8B) | 33K | 9.6 | 19.2 | February 2025 |
Frequently asked questions
- What is Aion 3.5?
- Aion 3.5 is an AI model by AionLabs. Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models.
- How much does Aion 3.5 cost on Zeplik?
- Input tokens cost 36.0 credits per million and output tokens 72.0 credits per million (1 credit = $0.10; the raw provider rates are $3.00 and $6.00 per million). New accounts start with free credits.
- How long can a conversation with Aion 3.5 be?
- Aion 3.5 has a 262K-token context window (262,144 tokens), which covers the conversation plus any documents you attach.
- Does Aion 3.5 support images and tools?
- Aion 3.5 is text-only and supports tool calling.
Related models
Aion 3.5 Mini is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models.
Aion-3.0 Mini is a multi-model roleplaying and storytelling system from AionLabs, built on the DeepSeek family of models.
Aion-3.0 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models.
Aion-2.0 is a variant of DeepSeek V3.2 optimized for immersive roleplaying and storytelling.
Aion-RP-Llama-3.1-8B ranks the highest in the character evaluation portion of the RPBench-Auto benchmark, a roleplaying-specific variant of Arena-Hard-Auto, where LLMs evaluate each other’s responses.
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use.
More you can do with Aion 3.5
- 467 AI skillsReady-to-run expert methods for writing, data, code and more, each running on Aion 3.5 or any model you pick.
- 997 integrationsConnect Gmail, Slack, GitHub, Notion and hundreds more so the assistant can work in your apps.
- Simple pricingPlus, Pro and Max plans with a monthly credit allowance that works across every model.