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Parakeet TDT 0.6B v3
- Speech-to-Text
- Multilingual ASR
- Open Weights
- Fast Inference
Parakeet TDT 0.6B v3 is NVIDIA’s 600M-parameter multilingual automatic speech recognition (ASR) model built on the FastConformer-TDT architecture, optimized for high-throughput speech-to-text across European languages.
About the model
What is Parakeet TDT 0.6B v3?
Parakeet TDT 0.6B v3 is a 600-million-parameter multilingual speech-to-text model from NVIDIA based on the FastConformer-TDT architecture and trained on over 670,000 hours of audio from the Granary dataset. It is primarily used for real-time and batch transcription of audio and video, offering automatic language detection across roughly 25 European or EU languages and returning text with punctuation and timestamps. It is also adopted in cost-efficient pipelines and offline tools as an alternative to Whisper-class ASR for multilingual captioning, dictation, and media indexing. Parakeet TDT 0.6B v3 is part of NVIDIA’s Parakeet family and follows earlier Parakeet TDT 0.6B v2 and related multilingual ASR work.
Model capabilities
5 Core Capabilities
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Multilingual ASR
Transcribes speech to text across 25 European languages using a 600M-parameter FastConformer-based automatic speech recognition architecture.
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Automatic Language Detection
Automatically detects the spoken language in audio input and performs transcription without requiring explicit language selection or prompting.
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Punctuation and Capitalization
Generates transcriptions enriched with automatic punctuation and capitalization, producing more readable, sentence-like output text from raw speech.
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Timestamp Generation
Produces accurate word-level and segment-level timestamps alongside transcriptions, enabling alignment of text with corresponding audio segments.
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Long Audio Transcription
Handles long-form audio, supporting inputs up to around 24 minutes with full attention or about 3 hours using local attention.
Use cases
6 Most Valuable Use Cases
- Multilingual Call Transcription
- Meeting Speech Transcripts
- Broadcast Subtitle Generation
- Voice Assistant Input
- Lecture & Podcast Transcripts
- Customer Support Call Logs
Transparent pricing
Cost Comparison
LLM API offers simple, predictable ASR pricing for Parakeet‑class models, competitive with or cheaper than major cloud STT APIs.
| Provider | Region | Latency | Throughput | Uptime | Input ($/1M) | Output ($/1M) | Context |
|---|---|---|---|---|---|---|---|
| LLM API BEST | Global | $0.006/min | 10 min audio | ||||
| NVIDIA | Global | 10 min audio | |||||
| OpenAI | Global | $0.006/min | 10 min audio | ||||
| Google Cloud | Global | 99.9% | $1.44/hr | 5 min audio | |||
| Azure | Global | 99.9% | $1.40/hr | 5 min audio |
Performance benchmarks
Technical Specifications
| Metric | Parakeet TDT 0.6B v3 | Parakeet TDT 1.1B v3 | Parakeet TDT 0.6B |
|---|---|---|---|
| Model Type | Transducer / TDT ASR | Transducer / TDT ASR | Transducer ASR |
| Parameter Count | 0.6B | 1.1B | 0.6B |
| Latency | — | — | — |
| Languages Supported | English | English | English |
| Price per Minute | — | — | — |
| Max Audio Duration | — | — | — |
| Accuracy (WER) | — | — | — |
| Uptime | — | — | — |
30-day usage via LLM API
- 720M
- Prompt tokens processed (30 days)
- 210M
- Completion tokens generated (30 days)
- 2.4M
- API requests served (30 days)
- 99.95%
- Avg uptime over last 30 days
Architecture & Integration
Why Build on LLM.API?
One unified API. Every major model. Built-in reliability, cost control, and observability.
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Unified AI Routing
Automatically route each request to the optimal model across providers based on latency, cost, or quality—without changing your integration or redeploying code.
One endpoint, every model. -
Cost-Aware Orchestration
Balance quality and spend by mixing premium and budget models, enforcing per-project limits, and getting clear cost insights per call, team, and environment.
Cut spend, keep quality. -
Resilient Fallback Flows
Define automatic fallbacks across models and providers so timeouts, rate limits, or regional outages degrade gracefully instead of breaking your production workloads.
No single point of failure. -
End-to-End Observability
Trace every request across models with logs, metrics, and structured events to debug latency, drift, and errors directly from your AI gateway, not scattered dashboards.
See every token hop. -
Task-Level Abstractions
Describe tasks like chat, tools, RAG, or moderation once and let LLM.API pick the best implementation details and models for each provider behind the scenes.
Think tasks, not APIs. -
High-Throughput Batch
Process millions of inferences efficiently with provider-optimized batching, backoff, and concurrency controls that maximize throughput while staying within rate and budget limits.
Scale from 10 to millions.
Decision guide
When to Use — When NOT to Use
Use it if...
- You need a compact speech model for low-resource or embedded transcription deployments.
- Your use case involves experimenting with NVIDIA Riva or NeMo-compatible speech pipelines.
- You need cost-effective batch transcription for short audio clips in controlled environments.
- Your use case involves prototyping speech-to-text features without requiring top-tier accuracy.
- You need a small-footprint model suitable for GPU sharing among multiple concurrent jobs.
Avoid if...
- You need state-of-the-art transcription accuracy across many accents, domains, and noisy recordings.
- Your workload requires robust long-form transcription with stable diarization and segmentation.
- You need multilingual speech recognition with strong support for many non-English languages.
- Your workload requires advanced reasoning, summarization, or multimodal understanding beyond plain transcription.
- You need enterprise-grade SLAs for mission-critical, large-scale production speech applications.
FAQ
Frequently Asked Questions
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What is Parakeet TDT 0.6B v3?
Parakeet TDT 0.6B v3 is a 0.6B-parameter NVIDIA speech model focused on fast, lightweight transcription and diarization tasks.
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What is Parakeet TDT 0.6B v3 best suited for?
It is best for real-time or near–real-time speech-to-text, turn detection, and diarization in resource-constrained or high-throughput environments.
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How is Parakeet TDT 0.6B v3 priced on LLM.API?
Pricing is usage-based per audio duration processed; check the Parakeet TDT 0.6B v3 entry on LLM.API’s pricing page for current rates.
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What is the context window or maximum audio length Parakeet TDT 0.6B v3 supports?
LLM.API caps the maximum audio duration per request; refer to the model’s documentation for the latest per-call audio length limit.
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How fast is Parakeet TDT 0.6B v3 in terms of latency?
Thanks to its small 0.6B size, it offers low latency and is suitable for streaming or interactive speech applications via LLM.API.
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What modalities does Parakeet TDT 0.6B v3 support?
Parakeet TDT 0.6B v3 accepts audio input and produces text outputs, including speaker and turn information where applicable.
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How do I call Parakeet TDT 0.6B v3 through LLM.API?
Use the LLM.API speech endpoint with the model identifier for Parakeet TDT 0.6B v3, passing audio data and configuration in the request body.
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How does Parakeet TDT 0.6B v3 compare to larger NVIDIA speech models?
Compared to larger Parakeet variants, it trades some accuracy for significantly lower latency, memory usage, and compute cost.
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Does Parakeet TDT 0.6B v3 support streaming transcription on LLM.API?
If enabled by LLM.API, you can use streaming mode for incremental transcripts; check the API reference for streaming availability details.
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What are the main limitations of Parakeet TDT 0.6B v3?
Its smaller size may reduce accuracy on noisy, highly accented, or domain-specific speech compared with larger, more capable speech models.