StepFun Step 3.5 Flash vs Microsoft MAI-Transcribe-1
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
Microsoft MAI-Transcribe-1
Microsoft's first in-house speech-recognition model -- launched 2026-04-02. #1 on FLEURS WER overall, #1 by FLEURS WER in 11 of the top 25 global languages. Beats Whisper-large-v3, Scribe v2, GPT-Transcribe, Gemini 3.1 Flash-Lite. $0.36/hour of audio on Azure Foundry
| Category | StepFun Step 3.5 Flash | Microsoft MAI-Transcribe-1 |
|---|---|---|
| Ease of Use | 6.0 | 6.0 |
| Output Quality | 8.0 | 9.5 |
| Value | 9.0 | 9.0 |
| Features | 8.0 | 7.0 |
| Overall | 7.8 | 7.9 |
Pricing Comparison
| Feature | StepFun Step 3.5 Flash | Microsoft MAI-Transcribe-1 |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0.36 |
Which Should You Pick?
Pick StepFun Step 3.5 Flash if...
- ✓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 Microsoft MAI-Transcribe-1 if...
- ✓Higher output quality (9.5 vs 8)
Developers and enterprises who need best-in-class multilingual speech-to-text for high-volume use cases (meeting recording pipelines, call-center transcription, accessibility captioning at scale, multilingual audio indexing). Especially relevant for Azure shops already on Microsoft infrastructure.
Visit Microsoft MAI-Transcribe-1Our Verdict
StepFun Step 3.5 Flash and Microsoft MAI-Transcribe-1 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 Microsoft MAI-Transcribe-1 works best for developers and enterprises who need best-in-class multilingual speech-to-text for high-volume use cases (meeting recording pipelines, call-center transcription, accessibility captioning at scale, multilingual audio indexing).