StepFun Step 3.5 Flash vs Paperclip
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
Paperclip
Open-source orchestration layer that turns your AI agents into a company -- org charts, budgets, governance, and heartbeats for the whole team
| Category | StepFun Step 3.5 Flash | Paperclip |
|---|---|---|
| Ease of Use | 6.0 | 7.5 |
| Output Quality | 8.0 | 8.5 |
| Value | 9.0 | 9.5 |
| Features | 8.0 | 9.0 |
| Overall | 7.8 | 8.6 |
Pricing Comparison
| Feature | StepFun Step 3.5 Flash | Paperclip |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Which Should You Pick?
Pick StepFun Step 3.5 Flash if...
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 Paperclip if...
- ✓Easier to use (7.5 vs 6)
- ✓More features (9 vs 8)
Operators running multiple agents who need real coordination -- an indie hacker running a content shop, a small team testing autonomous-biz concepts, or anyone whose 'I'll just open another Claude Code tab' workflow has hit the wall. The org-chart framing is a huge upgrade if you have 5+ agents already.
Visit PaperclipOur Verdict
Paperclip edges out StepFun Step 3.5 Flash with a 8.6 vs 7.8 overall score. Both are solid picks, but Paperclip has the advantage in output quality.