GPT-4o Transcribe Diarize
Audio transcription model by OpenAI.
OpenAI speech-to-text transcription and speaker diarization model powered by GPT-4o. Delivers automated multi-speaker audio transcription with precise timestamping and speaker attribution.
Context window
Maximum input context length.
16K
Max output
Maximum completion tokens per request.
2K
Maker
OpenAI
This model is deprecated
GPT-4o Transcribe Diarize has been deprecated. It is still served on nRouter and can still be called.
Caller Notice: To help identify integrations still relying on this model, all API responses now include x-nr-model-deprecated: true and Warning: 299 - "Model deprecated" headers.
Specifications
Context window, ranked against other audio transcription models
Proportional scale: 0 to 16K tokens. Not ranked, no published context window: gpt-transcribe, gpt-live-transcribe, whisper-1, gpt-4o-mini-transcribe.
16.0K
tokens2K
tokensaudio transcription
Pricing
Rates are read live
Pricing for gpt-4o-transcribe-diarize is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.
Availability
Not enough data yet
We have not collected enough health probes for this model to publish an uptime or latency figure. A percentage from a handful of samples is fabricated precision, so none is shown until the sample count supports one.
How GPT-4o Transcribe Diarize is billed
Billed at the provider's list price, with no per-token markup.
- Exact list price
- Tokens settle at the published rate of the model that served your call.
- Cache discounts passed through
- Provider prompt-caching discounts reach your balance with no added fee.
- Cost on every response
- Each response carries the
x-nr-request-costheader, so you can reconcile spend per request.
More from OpenAI
FAQs
What is GPT-4o Transcribe Diarize?
OpenAI speech-to-text transcription and speaker diarization model powered by GPT-4o. Delivers automated multi-speaker audio transcription with precise timestamping and speaker attribution.
How much does GPT-4o Transcribe Diarize cost?
GPT-4o Transcribe Diarize is billed at the provider's list price on nRouter with no per-token markup — tokens settle at the exact upstream rate. Input and output rates are read live, so see the pricing section above for the current figures.
What is the context length of GPT-4o Transcribe Diarize?
GPT-4o Transcribe Diarize supports a 16,000-token context window. It can generate up to 2,000 output tokens per request.
Does GPT-4o Transcribe Diarize support tool calling and structured outputs?
No. GPT-4o Transcribe Diarize does not support tool calling, so it cannot invoke external tools or functions.
What inputs and outputs does GPT-4o Transcribe Diarize support?
GPT-4o Transcribe Diarize is a audio transcription model. See the specifications section above for its exact supported input and output modalities.
How do I use GPT-4o Transcribe Diarize via nRouter?
Use any OpenAI-compatible client: point it at https://api.nrouter.ai/v1 with your nRouter API key and set the model to "openai/gpt-4o-transcribe-diarize".
When was GPT-4o Transcribe Diarize released?
GPT-4o Transcribe Diarize was released on March 20, 2025.
Where is the GPT-4o Transcribe Diarize documentation?
Start at nrouter.ai/docs. The quick-start guide (nrouter.ai/docs/getting-started/quick-start) covers API keys and your first request, and the API reference (nrouter.ai/docs/api-reference) lists every parameter.
What other audio models does OpenAI have?
Other OpenAI audio models on nRouter include GPT-OSS 120B 1 (nrouter.ai/models/gpt-oss-120b-1), GPT-6.1 Sol (nrouter.ai/models/gpt-6.1-sol), GPT-5.2 Pro (nrouter.ai/models/gpt-5.2-pro-2025-12-11), GPT Audio 1.5 (nrouter.ai/models/gpt-audio-1.5).