Releases
September 9, 2025

Introducing the In-App Playground: Test Speech-to-Text instantly—no code required

Skip the guesswork. Test with your own audio files and see exactly what you'll get in production, all from your browser.

Devon Malloy
Senior Growth Manager
Devon Malloy
Senior Growth Manager
Reviewed by
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Table of contents

Historically, getting from "looking for a Speech-to-Text provider" to "confident in deployment" has meant tedious processes of internal benchmarking, in-depth documentation reviews, and back-and-forth parameter testing. You want to test features with your actual audio files, see real performance with your use cases, and understand costs before committing to integration work. But traditional evaluation methods force you to choose between oversimplified demos and complex API implementations.

Today, we're closing that gap with the release of our new Speech-to-Text Playground. 

The AssemblyAI Playground now eliminates the guesswork from your STT evaluation. Upload your audio files, configure advanced features, and get production-identical results—all without writing a single line of code. When you're ready to deploy, we'll generate the exact API code you need.

Go from curious to confident in minutes, not months

Most evaluations start with browsing overwhelming documentation with dozens of API parameters to understand and no clear path to test which settings will work best for your specific use case. You're left guessing at configurations, making assumptions about feature combinations, and hoping your choices will work when you finally deploy.

The new AssemblyAI Playground changes this completely. Now, you can 

  • See exactly what you're buying: Test with your actual audio files and use cases. 
  • Securely upload sensitive audio knowing you can delete transcripts instantly for complete compliance. 
  • Generate production-ready code snippets directly from successful tests, with zero context loss between evaluation and implementation.

Breakthrough capabilities that set the Playground apart

1. Production-parity testing with real usage insights

Unlike demos that use simplified models or sample data, the Playground uses your actual account, API key, and production models. This means:

  • Real usage tracking: View in-app Playground usage in your dashboard’s cost tab, unlocking better forecasting of production spend 
  • Authentic performance metrics: No surprises when you deploy to real users
  • Real-world accuracy: Test with the same models your applications will use

2. Advanced feature exploration without complexity

Access the full power of AssemblyAI's Speech-to-Text capabilities through an intuitive interface:

  • Automatic Language Detection: Test multilingual content without configuration
  • Speaker Labels: See how well speaker separation works with your meeting recordings
  • PII Redaction: Evaluate privacy features with sensitive audio
  • Summarization: Experience AI-powered summaries on your content
  • Entity Detection: Identify key information from your domain-specific audio

3. Seamless transition to production

When testing confirms your confidence in the technology:

  • Code Generation: Copy production-ready API requests directly from successful playground runs
  • Configuration Preservation: All settings and parameters transfer seamlessly to your integration
  • Developer Handoff: Share exact specifications with your development team

Built for both technical and non-technical evaluators

For Product Managers and Decision-Makers

  • Risk-free evaluation: Test with real audio without touching production systems
  • Cross-functional accessibility: Enable entire teams to evaluate STT without technical skills
  • Compliance-ready: Secure transcript deletion ensures sensitive data protection

For Developers and ML Engineers

  • Production-identical environment: What you test is exactly what you'll deploy
  • Advanced configuration: Full access to API parameters through intuitive UI
  • Integration acceleration: Generated code snippets eliminate guesswork

For Integration Teams

  • Proof-of-concept elimination: Skip directly to confident implementation
  • Feature discovery: Explore advanced capabilities that improve your final solution
  • Reduced evaluation cycles: Transform weeks of testing into hours of validation

See the difference for yourself

The best way to understand the Playground's impact is to experience it directly:

Current customers: Log into your dashboard and click "Playground" to start testing advanced features risk-free with your existing account.

New evaluators: Sign up for free and get $50 in credits to explore the full Playground experience with your own audio files.

Enterprise teams: Enable your entire organization to evaluate Speech-to-Text capabilities without technical barriers—contact us to discuss your specific evaluation needs.

The Playground is live now

Start testing with production-quality results and see why customers consistently choose AssemblyAI when they can evaluate our technology with their actual use cases.

Try the In-App Playground
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