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StepFun: Step 5 Preview API Pricing
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...
How much does StepFun: Step 5 Preview cost for a real workload?
At 10M input + 2M output tokens per month, StepFun: Step 5 Preview costs about $15.4 ($10 input + $5.4 output). Try your own volumes in the cost calculator.
What are cheaper alternatives to StepFun: Step 5 Preview?
- Elorian: Glimpse — $0.6 in / $3 out per 1M
- ByteDance Seed: Seed-2.0-Code — $0.5 in / $3 out per 1M
- Google: Nano Banana 2 (Gemini 3.1 Flash Image) — $0.5 in / $3 out per 1M
- Google: Nano Banana 2 (Gemini 3.1 Flash Image Preview) — $0.5 in / $3 out per 1M
- Google: Gemini 3 Flash Preview — $0.5 in / $3 out per 1M
- OpenAI: GPT-3.5 Turbo Instruct — $1.5 in / $2 out per 1M
Compare StepFun: Step 5 Preview with other models
StepFun: Step 5 Preview vs StepFun: Step 3.5 FlashStepFun: Step 5 Preview vs StepFun: Step 3.7 Flash
Frequently asked questions
How much does StepFun: Step 5 Preview cost?
StepFun: Step 5 Preview costs $1 per 1M input tokens and $2.7 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $15.4.
What is the context window of StepFun: Step 5 Preview?
StepFun: Step 5 Preview has a context window of 1,048,576 tokens and can return up to 64,000 output tokens per response.
What are cheaper alternatives to StepFun: Step 5 Preview?
Cheaper models include Elorian: Glimpse ($0.6 in / $3 out), ByteDance Seed: Seed-2.0-Code ($0.5 in / $3 out), Google: Nano Banana 2 (Gemini 3.1 Flash Image) ($0.5 in / $3 out). See the full list on this page.
Is StepFun: Step 5 Preview free to use?
No. StepFun: Step 5 Preview is a paid model at $1 input / $2.7 output per 1M tokens. 20 free models are listed on the free models page.
Provider: stepfun · Model ID: stepfun/step-5-preview · Modality: text+image+video->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices