STEPFUN'S STEP 5 PREVIEW: NEAR-OPUS 5 INTELLIGENCE, 80% LOWER INPUT, 89% LOWER OUTPUT PRICES

Summary from the TLDR AI newsletter

STEPFUN [4] builds language, vision, and audio models. ⚡ STEP 5 PREVIEW costs $1/M input and $2.70/M output tokens, and scores near Claude Opus 5 (Medium) on AA's Intelligence Index. Built for coding agents, financial analysis, and long-running work, with a 1M-token context. NOW ON OPENROUTER AND AVAILABLE IN OPENCODE, KILO