StepFun Step 3.5 Flash vs HubSpot 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
HubSpot AI
AI baked into HubSpot's CRM and marketing suite -- write emails, score leads, and build reports with prompts
| Category | StepFun Step 3.5 Flash | HubSpot AI |
|---|---|---|
| Ease of Use | 6.0 | 7.0 |
| Output Quality | 8.0 | 6.0 |
| Value | 9.0 | 5.0 |
| Features | 8.0 | 8.0 |
| Overall | 7.8 | 6.5 |
Pricing Comparison
| Feature | StepFun Step 3.5 Flash | HubSpot AI |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Which Should You Pick?
Pick StepFun Step 3.5 Flash if...
- ✓Higher output quality (8 vs 6)
- ✓Better value for money (9/10)
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 HubSpot AI if...
- ✓Easier to use (7 vs 6)
Mid-size marketing teams already on HubSpot who want to speed up content creation and lead management.
Visit HubSpot AIOur Verdict
StepFun Step 3.5 Flash is the clear winner here with 7.8/10 vs 6.5/10. HubSpot AI isn't bad, but StepFun Step 3.5 Flash outperforms it across the board. Pick HubSpot AI only if mid-size marketing teams already on hubspot who want to speed up content creation and lead management.