Seed-OSS is a series of open-source large language models developed by ByteDance's Seed team, designed specifically for powerful long-context processing, reasoning, agents, and general capabilities. Among this series, Seed-OSS-36B-Instruct is an instruction-tuned model with 36 billion parameters that natively supports ultra-long context lengths, enabling it to process massive documents or complex codebases in a single pass. This model is specially optimized for reasoning, code generation, and agent tasks (such as tool usage), while maintaining balanced and excellent general capabilities. A notable feature of this model is the "Thinking Budget" functionality, which allows users to flexibly adjust the inference length as needed, thereby effectively improving inference efficiency in practical applications.
ByteDance-Seed/Seed-OSS-36B-Instruct vs Step 3.7 Flash
Compare ByteDance-Seed/Seed-OSS-36B-Instruct from ByteDance and Step 3.7 Flash from StepFun on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
step-3.7-flash is stepfun's flagship inference model, designed for high-complexity tasks that require deep reasoning and fast execution. It excels at decomposing multi-step problems, performing tool calls, and maintaining consistency across massive datasets. It is the preferred choice for complex workloads such as long-context agents, advanced software engineering, and end-to-end research automation.
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
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Performance Past 3 Days
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FAQ
Which is cheaper: ByteDance-Seed/Seed-OSS-36B-Instruct, Step 3.7 Flash?
ByteDance-Seed/Seed-OSS-36B-Instruct: $0.534/M output tokens; Step 3.7 Flash: $1.32/M. Use the cost calculator above to estimate your own workload.
Which responds faster?
ByteDance-Seed/Seed-OSS-36B-Instruct: 0.6s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
How large is each context window?
ByteDance-Seed/Seed-OSS-36B-Instruct accepts 256,000 and Step 3.7 Flash accepts 256,000 input tokens.
Which one generates tokens faster?
Step 3.7 Flash at 32.6 tok/s and ByteDance-Seed/Seed-OSS-36B-Instruct at 27.0 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
What inputs and capabilities does each model support?
ByteDance-Seed/Seed-OSS-36B-Instruct accepts text and image input and supports thinking, tool calling, function calling and structured outputs; Step 3.7 Flash accepts text, image and video input.
Can I call ByteDance-Seed/Seed-OSS-36B-Instruct and Step 3.7 Flash with the same API key?
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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