AssemblyAI vs Lepton AI: Token Pricing, Speed & Intelligence
Full comparison of AssemblyAI and Lepton AI — 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.
Lepton AI
NVIDIA DGX Cloud Lepton — enterprise serverless inference on DGX infrastructure
Lepton AI was acquired by NVIDIA and rebranded as NVIDIA DGX Cloud Lepton in 2026. The platform now runs on NVIDIA's DGX Cloud infrastructure, offering serverless inference for popular open-weight models with enterprise-grade reliability. The OpenAI-compatible API and developer experience remain intact, now backed by NVIDIA's global DGX Cloud footprint.
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Live token pricing
Strengths and weaknesses
AssemblyAI
Lepton AI
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.
The only serverless inference platform running directly on NVIDIA DGX Cloud — enterprise reliability with the latest NVIDIA hardware, no infrastructure management required.
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.
Lepton AI FAQs
What happened to Lepton AI?
Lepton AI was acquired by NVIDIA and rebranded as NVIDIA DGX Cloud Lepton in 2026. The platform now runs on NVIDIA's DGX Cloud infrastructure with the same developer-friendly API.
What models does NVIDIA DGX Cloud Lepton support?
DGX Cloud Lepton hosts Llama 3.3 70B and other popular open-weight models. The catalog is focused on widely-used production models.
Is DGX Cloud Lepton good for production workloads?
Yes. Backed by NVIDIA's DGX Cloud infrastructure, DGX Cloud Lepton offers enterprise-grade reliability and SLAs suitable for production workloads.
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.
Lepton AI — NVIDIA DGX Cloud Lepton — enterprise serverless inference on DGX infrastructure
Lepton AI was acquired by NVIDIA and rebranded as NVIDIA DGX Cloud Lepton in 2026. The platform now runs on NVIDIA's DGX Cloud infrastructure, offering serverless inference for popular open-weight models with enterprise-grade reliability. The OpenAI-compatible API and developer experience remain intact, now backed by NVIDIA's global DGX Cloud footprint.
The only serverless inference platform running directly on NVIDIA DGX Cloud — enterprise reliability with the latest NVIDIA hardware, no infrastructure management required.
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
Lepton AI
- Backed by NVIDIA DGX Cloud infrastructure
- Enterprise-grade reliability and SLAs
- Serverless — no infrastructure management
- Smaller model catalog than Together AI or Fireworks
- Pricing may be higher than budget inference providers
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
Lepton AI
- Smaller model catalog than Together AI or Fireworks
- Pricing may be higher than budget inference providers
- No fine-tuning support
Provider category context
AssemblyAI is a frontier lab, founded in 2017. Lepton AI is a inference api, founded in 2023. AssemblyAI as a frontier lab trains and serves its own proprietary models. Lepton AI 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 Lepton AI if you need backed by nvidia dgx cloud infrastructure. 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.