S
LLMstepfun
StepFun: 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
- Provider
- stepfun
- Category
- llm
- Context length
- 262,144 tokens
- Max output
- 65,536 tokens
- Modalities
- text
- License
- proprietary
- Released
- 2026-01-29
Pricing
- Input
- $0.10/Mtok
- Output
- $0.30/Mtok
- Model ID
stepfun/step-3.5-flash
Team cost calculator
Estimated monthly spend
$2.82
17.6M tokens / month
5 seats · 80 msgs/day
5 seats · 80 msgs/day
Providers
| Provider | Context | Input | Output | P50 latency | Throughput | 30d uptime |
|---|---|---|---|---|---|---|
| stepfun | 262k | $0.10/Mtok | $0.30/Mtok | — | — | — |
Performance
Performance snapshots are collected daily. Check back after the next ingestion run.
Benchmarks
Works well with
Top MCPs
Compatibility data comes from first-party telemetry; once we have enough co-usage signal, top MCPs for this model will appear here.
How Switchy teams use it
Not enough Spaces have used this model yet to share anonymised team stats. We wait for at least 50 distinct Spaces per week before publishing any aggregate.