Step 5 Preview (Tested): This MODEL BLEW MY BRAINS AWAY!
Visit StepFun: https://platform.stepfun.ai/In this video, I’ll be testing Step 5 Preview, StepFun’s new flagship AI model, across all eight KingBench 3 tasks. We’ll explore its coding and reasoning capabilities through interactive 3D projects, a playable archery game, an elevator simulation, SVG generation, and a locally fine-tuned Gemma 2B model with a working web interface.
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Key Takeaways:
🚀 Step 5 Preview supports a one-million-token context window and up to 64,000 output tokens.
🧠 Its mixture-of-experts architecture has 600 billion total parameters, with 27 billion active per token.
💻 Step works inside OpenCode to create files, run commands, test projects, and inspect its own output.
🏹 The playable archery game was one of its strongest results, scoring 9.5 out of 10.
🦥 Step completed a local LoRA fine-tuning workflow and built a web app powered by the trained Gemma 2B model.
🎮 Seven of the eight KingBench tasks received scores of at least eight out of ten.
📊 Step 5 Preview achieved 67 out of 80 points, giving it a final score of 83.75 percent.
💸 StepFun’s international API pricing starts at one dollar per million uncached input tokens.
⚖️ Step finished above the retained MiMo and GLM 5.3 Flash reference scores, while GLM 5.3 remained ahead.
👍 Overall, Step 5 Preview is a promising model for interactive prototypes, coding agents, and local AI development workflows. Receive SMS online on sms24.me
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