Unverified50% confidenceFactExact time
Step 5 Preview is StepFun's newly released next-generation flagship foundation model, using a sparse MoE architecture with a total parameter count of 600 billion, activating approximately 27 billion parameters per token.
1
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50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
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Related Claims
UnverifiedUnder the same concise prompt and reference-overlap scorer, the published 406M specialized model leads at least five commercially hosted large models by at least 6.2 points on ROUGE-1.68% similarUnverifiedThe user was using the Opus 5 Max model.67% similarUnverifiedStepFun's official charts claim that Step5 Preview is benchmarked against GLM-5.3 and comparable Qwen models, with per-task costs reduced by approximately 65%.65% similarUnverifiedMusk previously stated that Grok 4.6 is a 1.5 trillion parameter model and that Grok 4.7 is an entirely new 2.1 trillion parameter base model.64% similarUnverifiedIn terms of technical score, Step-5-preview ranked second.63% similar
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