StepFun's Step-5 Preview Leaks: 600B/27B Active, 1M Context, GPQA Diamond 93.5 (Vendor Numbers)
airesearch12 · x · 2026-09-20
Step-5 Preview from StepFun has appeared on Benchmark Heaven: 600B total parameters with 27B active, 1M context, and vendor-reported scores of GPQA Diamond 93.5, Terminal-Bench v2.1 85.0, BrowseComp 88.7, and AA Intelligence at the 96th percentile. All figures are vendor-reported and not yet independently verified.
Related event: StepFun Launches Step 5 Preview: 600B MoE Flagship, Open-Weights on Oct 15(17 posts)→
More from Models
- Blogger vouches for rumored Gemini 4 Carbon: good taste, cost-effective — intellectronica · 2026-11-12
- Walden Robotics' Sage model quadruples robot uptime on Toyota factory lines — adnothing · 2026-11-12
- Gemini won't let you keep chat history while opting out of AI training — Google bundles both into one setting — arshdeep · 2026-11-12
- Gemini 4 Carbon Flex tier now costs the same per token as GPT 6.1 Terra — mariofilhoml · 2026-11-12
- Real-world test: Kimi K3.1 Pro costs 5.4x less than Opus 5.5 per task despite 2x list-price gap — Arindam_1729 · 2026-11-12
- Claude Fable 5.2 tops Agent Arena at +30.4%, 1.5x the gain of runner-up Opus 5.5 — daniel_mac8 · 2026-11-12