StepFun Step 3.5 Flash vs Perplexity Computer
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
Perplexity Computer
Perplexity's general-purpose digital worker -- operates real software like you do, runs for hours or months, routes sub-tasks to Opus, Gemini, GPT-5.2, Grok, and Veo 3.1
Powered by Claude Opus 4.6 (core reasoning) + Model Council
| Category | StepFun Step 3.5 Flash | Perplexity Computer |
|---|---|---|
| Ease of Use | 6.0 | 8.5 |
| Output Quality | 8.0 | 9.0 |
| Value | 9.0 | 6.5 |
| Features | 8.0 | 9.5 |
| Overall | 7.8 | 8.4 |
Pricing Comparison
| Feature | StepFun Step 3.5 Flash | Perplexity Computer |
|---|---|---|
| Free Tier | Yes | No |
| Starting Price | $0 | $20 |
Which Should You Pick?
Pick StepFun Step 3.5 Flash if...
- ✓Better value for money (9/10)
- ✓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 Perplexity Computer if...
- ✓Higher output quality (9 vs 8)
- ✓Easier to use (8.5 vs 6)
- ✓More features (9.5 vs 8)
Professionals and small teams who will burn $200/month worth of research, drafting, and multi-step workflow time -- consultants, researchers, analysts, founders. Especially strong if you want frontier models across text, video, and images in one agent without stitching APIs together. The right pick if infrastructure is a non-starter and quality ceiling matters more than cost.
Visit Perplexity ComputerOur Verdict
Perplexity Computer edges out StepFun Step 3.5 Flash with a 8.4 vs 7.8 overall score. Both are solid picks, but Perplexity Computer has the advantage in output quality.