Step-3.5-Flash
ai model→ stable
Step-3.5-Flash, developed by StepFun, is a 196B parameter open-source model that uses a sparse mixture-of-experts architecture with 11B active parameters to deliver frontier-level reasoning and coding performance efficiently.
1Total Mentions
+0.80Sentiment (Very Positive)
0.0%Velocity (7d)
First seen: Mar 24, 2026Last active: Mar 24, 2026
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Timeline
1- Product LaunchFeb 24, 2026
Open-source MoE model released, outperforming Kimi K2.5 and Claude Opus 4.5 on key benchmarks with 18.9x lower operational cost.
View source- cost advantage:
- 18.9x less than Kimi K2.5
- architecture:
- Sparse Mixture-of-Experts
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Sentiment History
Positive sentiment
Negative sentiment
Range: -1 to +1
| Week | Avg Sentiment | Mentions |
|---|---|---|
| 2026-W13 | 0.80 | 1 |