ModelRegistry
Explore text, image, video and speech models
Find the right AI by model, modality and provider.
Browse modelsChoose with facts
Turn the model directory into an actionable evaluation workflow.
Clear capabilities
Review modalities, protocols, limits and status.
Transparent coverage
See which providers expose each model.
Easy comparison
Compare candidates using consistent dimensions.
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Model spotlight
Step 3.5 Flash
StepFun flash lane for quick multimodal reasoning and coding assistance
Compare modelsCore capabilities
A compact view of the model contract before integration.
Input and output
See supported modalities and generation directions.
Limits and context
Check context, output limits and release details.
Provider coverage
Compare the providers and protocols that expose this version.
Step 3.5 Flash FAQ
Start building with Step 3.5 Flash
Move from model evaluation to a production-ready workflow.
Core specifications
Released
2026-01-29
Context window
256K
Max output
256K
Model parameters
199B
Weights
Open
Modalities
Input
Text
Output
Text
Identity
- Version
- step-3.5-flash
- Knowledge cutoff
- 2025-01
- License
- Apache-2.0
- Aliases
- Step 3.5 Flash
Resources
Capabilities
Open weightReasoningTemperatureTool call
Pricing
IN $0.1/M
OUT $0.3/M
Read $0.02/M
Capabilities and fit
Model summary
StepFun flash lane for quick multimodal reasoning and coding assistance
Text
Open weightReasoningTemperatureTool call
- Output
- Text
- Capabilities
- 4
- Catalog updated
- 2026-08-06T01:20:52.891Z
- Status
Benchmark results
| Benchmark | Type | Score / rank | Evaluated |
|---|---|---|---|
| Artificial Analysis Coding Index | General | 31.6 | 2026-06-02T00:00:00.000Z |
| SciCode | Coding | 40.4 | 2026-06-02T00:00:00.000Z |
| Terminal-Bench Hard | Coding | 27.3 | 2026-06-02T00:00:00.000Z |
| SWE-Bench Verified | Coding | 74.4 | 2026-08-05T03:37:00.044Z |
Provider coverage
| Provider | Input | Output | Pricing |
|---|---|---|---|
| StepFun Step Plan (Global) | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| StepFun Step Plan (China) | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| ZenMux | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| EmpirioLabs AI | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| Kilo Gateway | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| Vercel AI Gateway | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| OpenRouter | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| StepFun (Global) | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| Qiniu | IN $0.1/M OUT $0.3/M Read $0.02/M | ||
| StepFun (China) | IN $0.1/M OUT $0.3/M Read $0.02/M |