Step 5 Preview Intelligence, Performance & Price Analysis
Summary
Step 5 Preview from StepFun benchmarks intelligence, speed, and cost for a proprietary LLM released in September 2026. The page highlights an Intelligence Index score of 44, 99.8 tokens per second, a 1M token context window, and multimodal input (text and image), with competitive pricing ($1 per 1M input tokens and $2.70 per 1M output tokens) and API access via one provider.