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Step 3.5 Flash
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by Stepfun
OPEN WEIGHTSLOCALAPILONG CONTEXTPAIDCLOSED
RANKED #223 OF 300 ASSISTANTS · OVERALL #352 OF 6,837 · VIBE SCORE 5.5 · 25 VOICES
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
HAPPY10.0
7 mentions
SAD-
0 mentions
VIBE TRAJECTORY
26 weeks · 20 voices
HOLDING UP
Recent vibe is steady. No clear fade in the crowd.
HOW TO USE IT
Open weights. You can use a hosted service, or download it and run it yourself, free.
WHAT THE INTERNET SAYS
The internet is split on Step 3.5 Flash. Biggest praise: help with code. Biggest gripe: getting facts right.
23 POSTS · 2 COMMENTS · LEMMY · BLOG · REDDIT · X · GITHUB
PEOPLE LOVE
- Popular for coding help (3 mentions)
PEOPLE COMPLAIN ABOUT
- Sometimes makes things up (3 mentions)
TOPIC BY TOPIC
- Help with codePEOPLE LOVE THIS
3 thumbs up · 1 thumbs down
- Getting facts rightA SORE SPOT
0 thumbs up · 3 thumbs down
LOOKING FOR AN ALTERNATIVE?
Other models the crowd has fully reviewed, starting with multimodal models like this one.
Grok 4.6
Qwen3.8 27B> SOURCES (12)
- X · 2026-08-20 · 37 UPVOTESyou can use step 3.5 flash by stepfun for FREE for 15 days😳 stepfun one of chinas ai tigers is running a limited promo
you can use step 3.5 flash by stepfun for FREE for 15 days😳 stepfun one of chinas ai tigers is running a limited promo
- REDDIT · 2026-02-10 · 34 UPVOTESLast week in Image & Video Generation
Last week in Image & Video Generation
- REDDIT · 2026-02-19 · 33 UPVOTESWhy DeepSeek V4 doesn't need more parameters to win
Why DeepSeek V4 doesn't need more parameters to win
- BLOG · 2026-06-06 · 32 UPVOTESLLM Research Papers: The 2026 List (January to May)
As some of you know, I have the long-running habit of keeping a running list of research papers I want to read, revisit, or cite in future articles and projects. Last year, I shared two organized paper lists, one covering January to June and another one…
- BLOG · 2026-03-22 · 32 UPVOTESA Visual Guide to Attention Variants in Modern LLMs
I had originally planned to write about DeepSeek V4. Since it still hasn’t been released, I used the time to work on something that had been on my list for a while, namely, collecting, organizing, and refining the different LLM architectures I have covered…
- BLOG · 2026-02-25 · 32 UPVOTESA Dream of Spring for Open-Weight LLMs: 10 Architectures from Jan-Feb 2026
If you have struggled a bit to keep up with open-weight model releases this month, this article should catch you up on the main themes. In this article, I will walk you through the ten main releases in chronological order, with a focus on the architecture…
- REDDIT · 2026-06-16 · 29 UPVOTESHalBench: 29 OSS models tested on a custom built Sycophancy and Hallucination Benchmark, Qwen 3.6 and Gemma 4 scoring far above their…
HalBench: 29 OSS models tested on a custom built Sycophancy and Hallucination Benchmark, Qwen 3.6 and Gemma 4 scoring far above their weight! (While Meta keeps proving they forgot how to spend their money...)
- REDDIT · 2026-02-19 · 25 UPVOTESGLM-5 is officially on NVIDIA NIM, and you can now use it to power Claude Code for FREE 🚀
GLM-5 is officially on NVIDIA NIM, and you can now use it to power Claude Code for FREE 🚀
- REDDIT · 2026-04-09 · 24 UPVOTESWhen are we gonna get more 1-Bit models(Medium & Large size)?
When are we gonna get more 1-Bit models(Medium & Large size)?
- REDDIT · 2026-02-12 · 16 UPVOTESStep-3.5-flash Unlosth dynamic ggufs?
Step-3.5-flash Unlosth dynamic ggufs?
- REDDIT · 2026-05-04 · 13 UPVOTESWhy is Step-3.5-Flash (196B-A11B) much cheaper to run than Qwen3.6-35B-A3B?
Why is Step-3.5-Flash (196B-A11B) much cheaper to run than Qwen3.6-35B-A3B?
- REDDIT · 2026-08-08 · 5 UPVOTESIs deepseek v4 flash the best model as subagent?
Is deepseek v4 flash the best model as subagent?