Aion-1.0 is a multi-model system designed for high performance across various tasks, including reasoning and coding. It is built on DeepSeek-R1, augmented with additional models and techniques such as Tree of Thoughts (ToT) and Mixture of E…
Model details →AionLabs: Aion-1.0 vs StepFun: Step 3.5 Flash
StepFun: Step 3.5 Flash wins on 4 of 6 axes — pricing and capability skew in its favour for most workloads.
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token. It is a reasoning model that is incredibly s…
Model details →Side-by-side comparison
| Capability | AionLabs: Aion-1.0 | StepFun: Step 3.5 Flash | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 262K | 🏆 StepFun: Step 3.5 Flash |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $4.00 | $0.10 | 🏆 StepFun: Step 3.5 Flash |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $8.00 | $0.30 | 🏆 StepFun: Step 3.5 Flash |
| Tool / function calling First-class support for emitting structured tool calls. | — | Yes | 🏆 StepFun: Step 3.5 Flash |
| Vision input Accepts image inputs alongside text. | — | — | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is AionLabs: Aion-1.0 better than StepFun: Step 3.5 Flash?
StepFun: Step 3.5 Flash wins on 4 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between AionLabs: Aion-1.0 and StepFun: Step 3.5 Flash?
Input: $4.00 vs $0.10 per 1M tokens. Output: $8.00 vs $0.30 per 1M tokens.
What context windows do AionLabs: Aion-1.0 and StepFun: Step 3.5 Flash support?
AionLabs: Aion-1.0 supports up to 131K tokens. StepFun: Step 3.5 Flash supports up to 262K tokens.
Do both AionLabs: Aion-1.0 and StepFun: Step 3.5 Flash support tool calling?
AionLabs: Aion-1.0: not advertised. StepFun: Step 3.5 Flash: yes.
Compare AionLabs: Aion-1.0 with other models
vs AI21: Jamba Large 1.7vs AionLabs: Aion-1.0-Minivs AionLabs: Aion-2.0vs AionLabs: Aion-RP 1.0 (8B)