As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/gpt-audio-1-5/

# GPT-Audio-1.5 (and gpt-audio / gpt-audio-mini)

OpenAI, GPT Audio family. Status: current. Type: speech and audio. Released: 2026-02-23. Training cutoff: 2024-09.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| OpenAI API | `gpt-audio-1.5` | https://api.openai.com/v1/chat/completions | https://developers.openai.com/api/docs/models/gpt-audio-1.5 |
| OpenAI API | `gpt-audio-mini` | https://api.openai.com/v1/chat/completions | https://developers.openai.com/api/docs/models/gpt-audio-mini |

## Pricing

- Text input: $2.50 per 1M tokens
- Text output: $10 per 1M tokens
- Audio input: $32 per 1M tokens
- Audio output: $64 per 1M tokens
- Unit as published: per 1M tokens (USD); gpt-audio same; gpt-audio-mini audio $10 / $20, text $0.60 / $2.40
- Source: https://developers.openai.com/api/docs/pricing
- Last checked: 2026-09-29

## Specs

- Input: text, audio
- Output: text, audio
- Context window: 128,000 tokens
- Max output: 16,384 tokens
- Open weights: no
- Licence: proprietary

## Where it stands

- Newer speech and audio models in the registry since its release: 65. The 5 newest:
  - NVIDIA Nemotron 3.5 Transcribe (30B-A4B) (2026-10-28) https://postcutoff.com/m/nemotron-3-5-transcribe/
  - Hy-SimulMT-30B-A3B (2026-10-22) https://postcutoff.com/m/hy-simulmt-30b-a3b/
  - Eleven Realtime v1 Max / Mini (2026-10-20) https://postcutoff.com/m/eleven-realtime-v1-max/
  - Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3) (2026-10-20) https://postcutoff.com/m/voxtral-mini-transcribe-3/
  - Voxtral Small Transcribe 3 (2026-10-20) https://postcutoff.com/m/voxtral-small-transcribe-3/
- Before it from OpenAI: GPT-Realtime and GPT-Realtime mini (2025-08-28) https://postcutoff.com/m/gpt-realtime/
- After it from OpenAI: GPT-Realtime-Whisper (2026-05-07) https://postcutoff.com/m/gpt-realtime-whisper/
- Closed weights; access is hosted only.

## What stands out

- Audio in / audio out over Chat Completions: Non-realtime REST alternative to the Realtime API: send audio and receive spoken audio plus text in one Chat Completions call, with streaming and function calling. Source: https://developers.openai.com/api/docs/models/gpt-audio-1.5

## Notes

gpt-audio-1.5 released 2026-02-23 with gpt-realtime-1.5. Older gpt-audio (2025) and gpt-audio-mini (2025-10-06) were deprecated 2026-07-20 with shutdown 2027-01-20 (replacement gpt-audio-1.5); gpt-4o-audio-preview was shut down 2026-05-12. Chat Completions only (not Responses).

Sources:
- https://developers.openai.com/api/docs/models/gpt-audio-1.5
- https://developers.openai.com/api/docs/pricing
- https://developers.openai.com/api/docs/changelog
- https://developers.openai.com/api/docs/deprecations

Model page: https://postcutoff.com/m/gpt-audio-1-5/