Step 3.5 Flash
Stepfun
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....
What is Step 3.5 Flash?
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....
Specifications
- Developer: Stepfun
- Context window: 262.1K tokens
- Max output: 65.5K tokens
- Input modalities: text
- Output modalities: text
- Input price: $0.1000 per 1M tokens
- Output price: $0.3000 per 1M tokens
- Knowledge cutoff: —
- Supported parameters: frequency_penalty, include_reasoning, logit_bias, max_tokens, min_p, presence_penalty, reasoning, repetition_penalty, response_format, seed, stop, temperature, tool_choice, tools, top_k, top_p
Use Step 3.5 Flash with PromptLayer
PromptLayer lets teams manage, evaluate, and observe prompts that run on Step 3.5 Flash alongside every other model in their stack. Version prompts, run evals across models, and ship safe rollouts from the same dashboard.
Ready to try it yourself? Sign up for PromptLayer and start managing your prompts in minutes.