References 684% CONFIDENCEOverall confidence: 84%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]90%platform.stepfun.ai/docs/en/guides/models/step-5-previewplatform.stepfun.ai· Posted Oct 12, 2026· Starts Sep 20, 2026· 17% of score
RuntimeWire's[6] report dated 20 September says StepFun[2] "launches" the model that day and Daily Economic News says StepFun released it on 20 September (9月20日); the docs page itself is undated. Wikipedia's 18 September and OpenRouter's 8 October router listing disagree, and are not the launch.
- [2]90%Pricing and Rate Limits - StepFun Documentationplatform.stepfun.ai· Added Oct 12, 2026· 17% of score
StepFun's[1] pricing table: step-5-preview at $1.00 per 1 million input tokens (cache miss), $0.10 cache hit and $2.70 output, output including the reasoning trace; step-3.7-flash $0.20, $0.04 and $1.15; step-3.5-flash $0.10, $0.02 and $0.30.
- [3]85%Step 5 Preview - Intelligence, Performance & Price Analysis - Artificial Analysisartificialanalysis.ai· Added Oct 12, 2026· 17% of score
Independent evaluation: 44 on the Intelligence Index v4.3.2 (40th of 218), 88.5 output tokens per second, $1.03 per Intelligence Index task, 160M output tokens in the index run (very verbose), 1M context, text and image input, listed as a proprietary model released in September 2026.[1]
- [4]75%阶跃星辰发布Step 5 Preview - 每日经济新闻 via Sina Financefinance.sina.cn· Published Sep 21, 2026· 16% of score
Daily Economic News on 21 September: StepFun[1][2] released Step 5 Preview on 20 September, 600B total and 27B active, 1M context, 44 on the Artificial Analysis[3] index (Qwen3.8 Max and GLM-5.3 score 45), DeepSWE v1.1 67.7%, single-task cost 1/8 of Claude Opus 5, and an analyst calling it a "textbook" pass that is one step short of a generational leap.
- [5]70%StepFun Step 5 Preview: specs, pricing, benchmarks, and my take - eesel AIeesel.ai· Published Sep 21, 2026· 16% of score
Third-party write-up that reproduces StepFun's[1][2] launch charts and tables: the benchmark comparison against Kimi K3, GLM-5.3, GPT-6 Astra and Claude Opus 5, 64k max output, up to 60 images per request, the 15 October open-weights countdown and the -65% cost Pareto chart.