AssemblyAI vs SiliconFlow: Token Pricing, Speed & Intelligence
Full comparison of AssemblyAI and SiliconFlow — live token pricing, latency, throughput, context window, strengths, weaknesses, and best use cases. Rates sourced from public APIs — verify before use.
AssemblyAI
Universal-2 speech-to-text with speaker diarisation and audio intelligence
AssemblyAI provides a speech-to-text and audio intelligence API. Its Universal-2 model offers high-accuracy transcription with built-in speaker diarisation, sentiment analysis, topic detection, and PII redaction. The Nano model targets cost-sensitive batch workloads. Pricing is per audio hour.
SiliconFlow
Chinese LLM inference platform with CNY pricing
SiliconFlow (siliconflow.cn) is an LLM inference platform offering access to models including GLM and DeepSeek families via an OpenAI-compatible API, with pricing denominated in CNY.
Key metric comparison
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Live token pricing
Strengths and weaknesses
AssemblyAI
Key differentiators
Universal-2 bundles transcription with speaker diarisation, sentiment, topic detection, and PII redaction — plus LeMUR for LLM-powered audio Q&A — in a single API call.
Frequently asked questions
AssemblyAI FAQs
How is AssemblyAI priced?
AssemblyAI charges per audio hour. Universal-2 is $0.37/hour and Nano is $0.10/hour. Additional audio intelligence features (diarisation, sentiment, PII redaction) are priced separately. See assemblyai.com/pricing for current rates.
What is Universal-2?
Universal-2 is AssemblyAI's flagship transcription model with built-in speaker diarisation, sentiment analysis, topic detection, and PII redaction. It is designed for meeting intelligence and call analytics use cases.
What is LeMUR?
LeMUR (Leveraging Large Language Models to Understand Recorded Audio) is an AssemblyAI feature that lets you run LLM-powered Q&A, summarisation, and action-item extraction directly over transcribed audio without building a separate pipeline.
SiliconFlow FAQs
What is SiliconFlow?
SiliconFlow is an LLM inference platform offering access to models including GLM and DeepSeek families. See siliconflow.cn for details.
What currency does SiliconFlow use for pricing?
SiliconFlow prices are denominated in CNY. See siliconflow.cn/pricing for current rates.
Is the SiliconFlow API OpenAI-compatible?
SiliconFlow provides an OpenAI-compatible API. See siliconflow.cn for endpoint details.
Provider resources
AssemblyAI — Universal-2 speech-to-text with speaker diarisation and audio intelligence
AssemblyAI provides a speech-to-text and audio intelligence API. Its Universal-2 model offers high-accuracy transcription with built-in speaker diarisation, sentiment analysis, topic detection, and PII redaction. The Nano model targets cost-sensitive batch workloads. Pricing is per audio hour.
Universal-2 bundles transcription with speaker diarisation, sentiment, topic detection, and PII redaction — plus LeMUR for LLM-powered audio Q&A — in a single API call.
SiliconFlow — Chinese LLM inference platform with CNY pricing
SiliconFlow (siliconflow.cn) is an LLM inference platform offering access to models including GLM and DeepSeek families via an OpenAI-compatible API, with pricing denominated in CNY.
Key strengths compared
AssemblyAI
- Universal-2 includes speaker diarisation, sentiment, topics, and PII redaction out of the box
- Audio intelligence features reduce need for post-processing pipelines
- Nano tier at $0.10/hour for cost-sensitive batch transcription
- Speech and audio only — no general-purpose LLM or image models
- Per-hour pricing model differs from token-based LLM APIs
SiliconFlow
Key weaknesses compared
AssemblyAI
- Speech and audio only — no general-purpose LLM or image models
- Per-hour pricing model differs from token-based LLM APIs
- Advanced audio intelligence features add cost on top of base transcription
SiliconFlow
Provider category context
AssemblyAI is a frontier lab, founded in 2017. SiliconFlow is a inference api. AssemblyAI as a frontier lab trains and serves its own proprietary models. SiliconFlow as an inference API provider hosts open-weight models — typically offering lower prices for equivalent capability tiers but without access to proprietary frontier models.
How to choose between them
Choose AssemblyAI if you need Meeting intelligence. Choose SiliconFlow if you need . For high-volume production workloads, run a cost comparison using the token pricing table above with your actual prompt/completion token ratio — the cheapest provider depends heavily on your input-to-output token ratio.