Step 5 Preview Quietly Debuts on AA: Score 44, 1M Context, $1/1M Input
teortaxesTex · x · 2026-09-19
Per @AndrewCurran and teortaxesTex, StepFun's Step 5 Preview has quietly appeared on Artificial Analysis with no official announcement.
Key numbers:
- AA Intelligence Index score of 44 (median 25), ranking 25/200
- 1M token context window, text + image input
- Priced at $1.00/1M input and $2.70/1M output, with 95% cache discount — competitive vs medians
- Reasoning model, extremely verbose: 160M tokens per benchmark run vs 90M median
teortaxesTex: the AA score seems directionally right; underbaked in places, but the full version could join the Chinese frontier.
Related event: StepFun Launches Step 5 Preview: 600B MoE Flagship, Open-Weights on Oct 15(17 posts)→
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