StepFun Step 3.5 Flash vs PhotoRoom
Which one should you pick? Here's the full breakdown.
StepFun Step 3.5 Flash
StepFun's (China) agent-focused open-weight model -- Step 3.5 Flash launched 2026-02-01. 196B sparse MoE, ~11B active. Benchmarks slightly ahead of DeepSeek V3.2 at over 3x smaller total size. Step 3 (321B / 38B active, Apache 2.0) and Step3-VL-10B multimodal also in the family
PhotoRoom
AI background removal and product photo editor -- built for e-commerce sellers who need clean listings fast
| Category | StepFun Step 3.5 Flash | PhotoRoom |
|---|---|---|
| Ease of Use | 6.0 | 9.0 |
| Output Quality | 8.0 | 8.0 |
| Value | 9.0 | 7.0 |
| Features | 8.0 | 7.0 |
| Overall | 7.8 | 7.8 |
Pricing Comparison
| Feature | StepFun Step 3.5 Flash | PhotoRoom |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Which Should You Pick?
Pick StepFun Step 3.5 Flash if...
- ✓Better value for money (9/10)
- ✓More features (8 vs 7)
Teams building agent systems on Chinese open-weight foundations who want something other than DeepSeek or Qwen, especially if agentic tool-use is the primary workload. Also good for Chinese-market products where StepFun's domestic tuning advantages matter. And for anyone looking to add diversity to their open-weight evaluation matrix beyond the top-3 Chinese labs.
Visit StepFun Step 3.5 FlashPick PhotoRoom if...
- ✓Easier to use (9 vs 6)
E-commerce sellers, Etsy/Amazon/eBay resellers, and small business owners who need clean product photos at scale. The batch editing alone can save hours per week.
Visit PhotoRoomOur Verdict
StepFun Step 3.5 Flash and PhotoRoom are extremely close overall. Your choice comes down to specific needs -- StepFun Step 3.5 Flash is better for teams building agent systems on chinese open-weight foundations who want something other than deepseek or qwen, especially if agentic tool-use is the primary workload, while PhotoRoom works best for e-commerce sellers, etsy/amazon/ebay resellers, and small business owners who need clean product photos at scale.