Mistral Small 4 is the next major release in the Mistral Small family, unifying the capabilities of several flagship Mistral models into a single system. It combines strong reasoning from Magistral, multimodal understanding from Pixtral, an…
Model details →Mistral: Mistral Small 4 vs StepFun: Step 3.5 Flash
StepFun: Step 3.5 Flash wins on 2 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 | Mistral: Mistral Small 4 | StepFun: Step 3.5 Flash | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 262K | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.15 | $0.10 | 🏆 StepFun: Step 3.5 Flash |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.60 | $0.30 | 🏆 StepFun: Step 3.5 Flash |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | — | 🏆 Mistral: Mistral Small 4 |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Mistral: Mistral Small 4 better than StepFun: Step 3.5 Flash?
StepFun: Step 3.5 Flash wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Mistral: Mistral Small 4 and StepFun: Step 3.5 Flash?
Input: $0.15 vs $0.10 per 1M tokens. Output: $0.60 vs $0.30 per 1M tokens.
What context windows do Mistral: Mistral Small 4 and StepFun: Step 3.5 Flash support?
Mistral: Mistral Small 4 supports up to 262K tokens. StepFun: Step 3.5 Flash supports up to 262K tokens.
Do both Mistral: Mistral Small 4 and StepFun: Step 3.5 Flash support tool calling?
Mistral: Mistral Small 4: yes. StepFun: Step 3.5 Flash: yes.