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StepFun: Step 5 Preview

stepfun/step-5-preview · agent · text+image+video->text · 1M ctx · added 2026-10-08
$0.1450·2.6996 /M effective hit 95% 1.037T/d

Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...

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openrouter/stepfun/step-5-preview
StepFun: Step 5 Preview · agent · text+image+video->text · 1M ctx
1.037T/d 95% $0.1450·2.6996 – 1mo
sticker
life 429 tok/d dp age
¢ ¢ᵉ ¢ⁱ
featherless/fp4
$1.0000·2.7000·0.1000 $0.1450·2.7000ⁱ $0.1035·2.6997ᵉ 93% – – 0.2% ✓ 10559ms 8t/s 1d ·
⚡ ♻ ✓ ★
stepfun/fp8
$1.0000·2.7000·0.1000 $0.1450·2.7000ⁱ $0.1450·2.6996ᵉ 95% – – 100% ◐ 3479ms 105t/s 1d ·
vercel/stepfun/step-5-preview
Step 5 Preview · agent · text+image+video->text · 1M ctx
– 95% $0.1451·2.7000 – 1mo
requesty/stepfun/step-5-preview
step-5-preview · agent · text+image->text · 1M ctx
– $0.0976·2.7000 – 1mo
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