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Favicon for assemblyai

AssemblyAI

Access 1 AssemblyAI model through the OpenRouter unified API including Universal-3.5 Pro. Compare pricing, context windows, benchmarks, and capabilities between different AssemblyAI models.

AssemblyAI requests made on OpenRouter

  • Favicon for assemblyai
    AssemblyAI: Universal-3.5 ProUniversal-3.5 Pro
    67.9M characters

    Universal-3.5 Pro is AssemblyAI's speech-to-text model served through its Sync API, returning a complete transcript with word-level timestamps in a single synchronous response for audio clips up to 120 seconds. It accepts 16-bit WAV input and supports free-text prompting, keyterms, and conversation context to steer transcription toward domain vocabulary.

    by assemblyaiSep 22, 2026from $0.000125/second

Frequently asked questions

OpenRouter serves 1 AssemblyAI model behind one OpenAI-compatible API. Create an OpenRouter API key, point your client at https://openrouter.ai/api/v1, and set the model to an ID such as assemblyai/universal-3-5-pro. The quickstart has request examples for every supported SDK.

Universal-3.5 Pro is the most recently added AssemblyAI model on OpenRouter, listed on September 22, 2026.