StepFun Step 3.5 Flash vs Beautiful.ai
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
Beautiful.ai
AI-powered presentation builder that auto-formats slides as you add content
| Category | StepFun Step 3.5 Flash | Beautiful.ai |
|---|---|---|
| Ease of Use | 6.0 | 8.0 |
| Output Quality | 8.0 | 7.0 |
| Value | 9.0 | 5.0 |
| Features | 8.0 | 7.0 |
| Overall | 7.8 | 6.8 |
Pricing Comparison
| Feature | StepFun Step 3.5 Flash | Beautiful.ai |
|---|---|---|
| Free Tier | Yes | No |
| Starting Price | $0 | $12 |
Which Should You Pick?
Pick StepFun Step 3.5 Flash if...
- ✓Higher output quality (8 vs 7)
- ✓Better value for money (9/10)
- ✓More features (8 vs 7)
- ✓Has a free tier
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 Beautiful.ai if...
- ✓Easier to use (8 vs 6)
Sales teams and consultants who make a lot of presentations and want them to look polished without hiring a designer. The analytics are a nice bonus for tracking prospect engagement.
Visit Beautiful.aiOur Verdict
StepFun Step 3.5 Flash is the clear winner here with 7.8/10 vs 6.8/10. Beautiful.ai isn't bad, but StepFun Step 3.5 Flash outperforms it across the board. Pick Beautiful.ai only if sales teams and consultants who make a lot of presentations and want them to look polished without hiring a designer.