Aion 3.5 Mini is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. It is the smaller, lower-cost sibling of Aion 3.5 and uses...
Model details →AionLabs: Aion 3.5 Mini vs StepFun: Step 5 Preview
AionLabs: Aion 3.5 Mini and StepFun: Step 5 Preview are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
Model details →Side-by-side comparison
| Capability | AionLabs: Aion 3.5 Mini | StepFun: Step 5 Preview | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 1M | 🏆 StepFun: Step 5 Preview |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.70 | $1.00 | 🏆 AionLabs: Aion 3.5 Mini |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $1.40 | $2.70 | 🏆 AionLabs: Aion 3.5 Mini |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 StepFun: Step 5 Preview |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is AionLabs: Aion 3.5 Mini better than StepFun: Step 5 Preview?
AionLabs: Aion 3.5 Mini and StepFun: Step 5 Preview are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between AionLabs: Aion 3.5 Mini and StepFun: Step 5 Preview?
Input: $0.70 vs $1.00 per 1M tokens. Output: $1.40 vs $2.70 per 1M tokens.
What context windows do AionLabs: Aion 3.5 Mini and StepFun: Step 5 Preview support?
AionLabs: Aion 3.5 Mini supports up to 262K tokens. StepFun: Step 5 Preview supports up to 1M tokens.
Do both AionLabs: Aion 3.5 Mini and StepFun: Step 5 Preview support tool calling?
AionLabs: Aion 3.5 Mini: yes. StepFun: Step 5 Preview: yes.