Ali Asif

The AI log, by topic

StepFun: what I’ve logged

StepFun comes up in 3 posts of my AI log, from February 2026 to September 2026, and each item below links to the primary source. The releases I logged include Step 5 Preview, Step 3.7 Flash and Step 3.5 Flash, filed under frontier, image, video, world and open weights.

Items that mention StepFun

  1. StepFun 14 Sep 2026

    Step 5 Preview

    A 600B mixture-of-experts model with 27B active parameters and a 1M-token window, aimed at agentic software and finance work.

    Primary source

  2. StepFun 25 May 2026

    Step 3.7 Flash

    StepFun's May 28 release, with a model page on Hugging Face.

    Primary source

  3. StepFun 2 Feb 2026

    Step 3.5 Flash

    StepFun's fast open reasoning and agent model.

    Primary source

Posts that cover StepFun

September 20261 entry

  1. Week of 14 Sep 2026Gemini 3.8 Live, open Qwen-Image-2.1 and Anthropic's Accenture pactFrontier · Image, video, world · Open weights · Policy and business

May 20261 entry

  1. Week of 25 May 2026Claude Opus 4.8, NVIDIA's Cosmos 3 keynote, Codex on WindowsFrontier · Image, video, world · Agents and coding · Science

February 20261 entry

  1. Week of 2 Feb 2026Claude Opus 4.6 and GPT-5.3-Codex land on the same dayFrontier · Open weights · Agents and coding