← Model list
stepfun-ai/Step-3.5-Flash
stepfun·stepfun/step-3.5-flash-3·GA·Closed·step series
StepFun flash model for efficient multimodal reasoning, coding, and tool use
At a glance
Reference price$0.10 / $0.30 per 1M
Cache read — · SiliconFlow (China)
Lowest paid$0.10 / $0.30
SiliconFlow Cloud · 1× spread
Context262,000
Output limit262,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured output✓ TemperatureAttachments
Modalities
Text
Knowledge cutoff—
Released / updated2026-02-11 / 2026-02-11
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 2 providers2 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| SiliconFlow stepfun-ai/Step-3.5-Flash | Cloud | $0.10 | $0.30 | — | — | 262,000 | 262,000 | |
| SiliconFlow (China) stepfun-ai/Step-3.5-Flash | Cloud | $0.10 | $0.30 | — | — | 262,000 | 262,000 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1SiliconFlow$35.00
2SiliconFlow (China)$35.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
Upstream provides no control info
2 / 2 providers expose no reasoning control (reasoning_options: []).
Related models
StepAudio 2.5 TTSsame series—StepAudio 2.5 ASRsame series—Step TTS 2same series—GLM-4.7-Flashcheaper alternative$0 / $0Hy3cheaper alternative$0 / $0Nemotron 3 Nano 30B A3Bcheaper alternative$0 / $0Qwen3.7 Flashcheaper alternative$0.03 / $0.118
Price historyone sample accumulated per data sync
Input listOutput listMin blended