Developing story · 2 episodes · 20 Sept to 21 Sept
StepFun Unveils Massive AI Context Upgrade
The saga follows StepFun's rollout of its Step 5 preview, introducing a 1-million token context and a $1 per input pricing model. After the latest announcement, the platform now offers unprecedented context length at a low cost, positioning it as a competitive AI service.
-
StepFun launches Step 5 Preview with 1M-token context and $1 input pricing
StepFun announced Step 5 Preview, its flagship mixture‑of‑experts model aimed at agentic software engineering, knowledge work, and finance tasks. The model totals about 600 billion parameters but…
1 source -
this looks promising: stepfun-ai/Step-5-Preview-BF16 · Hugging Face
this looks promising: stepfun-ai/Step-5-Preview-BF16 · Hugging Face Hugging Face Models Datasets Spaces Buckets new Docs Enterprise Pricing Website Tasks HuggingChat Collections Languages…
1 source primary source
Who and what
StepFunArtificial AnalysisStep-5-Preview-BF16Step 5 PreviewGPT-6 AstraClaude Opus 5Qwen3-30B-A3BMichal Sutter