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StepFun Launches 2 Step 3.5 Flash Base Models

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๐Ÿฆ™Read original on Reddit r/LocalLLaMA
#base-models#open-source-releasestepfun-step-3.5-flashstepfunstep-3.5-flash

๐Ÿ’กNew base models for Step 3.5 Flash: fresh open-weight options for local fine-tuning.

โšก 30-Second TL;DR

What Changed

Two base models released for Step 3.5 Flash

Why It Matters

Provides local AI practitioners with new open-weight base models to fine-tune or deploy efficiently. Expands options in the StepFun ecosystem for custom LLM development.

What To Do Next

Download the two base models from the Reddit link and test in your local LLM setup.

Who should care:Developers & AI Engineers

Key Points

  • โ€ขTwo base models released for Step 3.5 Flash
  • โ€ขAnnouncement via Reddit r/LocalLLaMA by u/tarruda
  • โ€ขDirect links to models and comments provided

๐Ÿง  Deep Insight

Background and context from public sources โ€” not the original article. 4 sources cited.

๐Ÿ”‘ Enhanced Key Takeaways

  • โ€ขStepFun, founded in 2023 by former Microsoft executive Jiang Daxin, prioritizes multimodal AI models over text-only ones, aiming toward embodied intelligence and AGI.[1]
  • โ€ขThe company raised approximately USD719 million in a Series B+ funding round in January 2025 from investors including state-owned funds, Tencent, and Qiming Venture Partners.[3]
  • โ€ขStepFun partnered with Geely in February 2025 to integrate its open-source video and audio models into smart car systems.[1]

๐Ÿ”ฎ Future ImplicationsAI analysis grounded in cited sources

StepFun's Step 3.5 Flash models will accelerate multimodal AI adoption in Chinese automotive applications
Its February 2025 partnership with Geely integrates StepFun's video and audio models into smart cars, positioning the new Flash series for similar real-world deployments.[1]
Funding influx enables StepFun to scale beyond 1T parameters rapidly
With USD719M raised in January 2025, StepFun can expand its Shanghai computing center to support trillion-parameter models like the prior Step-2 series.[3]

โณ Timeline

2023-04
StepFun founded by Jiang Daxin, ex-Microsoft chief scientist
2024
Launched Step-1V multimodal LLM with over 100B parameters
2024-12
Raised hundreds of millions in Series B funding led by Fortera Capital
2025-01
Secured USD719M in Series B+ funding and appointed Yin Qi as chairman
2025-02
Announced partnership with Geely for AI integration in smart cars
2026-03
Released two base models for Step 3.5 Flash series
๐Ÿฆ™Read original article on Reddit r/LocalLLaMA
๐Ÿ“ฐ

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Original source: Reddit r/LocalLLaMA โ†—

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