gpt-audio
GPT Audio is OpenAI’s audio capable conversational model. Use the OpenAI-compatible chat completions API with audio output modalities; audio token usage is billed at the model’s token rates. The Playground may return audio data that is not playable in the browser.
Pricing: Input 600 credits / 1M tokens (≈ $3.00), Output 2400 credits / 1M tokens (≈ $12.00).
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GPT Audio API on ModelFold
GPT Audio is OpenAI’s audio capable conversational model. Use the OpenAI-compatible chat completions API with audio output modalities; audio token usage is billed at the model’s token rates. The Playground may return audio data that is not playable in the browser. Try GPT Audio in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the GPT Audio API
GPT Audio at a glance
GPT Audio is a chat model from OpenAI. It accepts text and audio as input and returns text, with a context window of up to 128K tokens.
Use it without hosting anything
On ModelFold you call GPT Audio with a single API key — no model weights to download and no inference servers to run. The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of GPT Audio
Up to 128K tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Understands audio
Besides text, GPT Audio accepts audio as input, so a single request can combine instructions with visual or other media.
Function calling
GPT Audio supports tool (function) calling: describe your functions in the request and the model returns structured calls your code can run — the basis for agents and integrations.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use GPT Audio on ModelFold
- 1
Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how GPT Audio responds before writing any code.
- 2
Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
- 3
Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "gpt-audio" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
- ✓
Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
What You Can Build with GPT Audio
Audio and video analysis
Summarize recordings, meetings and video clips, extract key points and answer questions about their content.
Writing and content
Draft, edit and translate articles, emails, product copy and documentation in a consistent tone.
Frequently Asked Questions
What is GPT Audio?⌄
GPT Audio is OpenAI’s audio capable conversational model. Use the OpenAI-compatible chat completions API with audio output modalities; audio token usage is billed at the model’s token rates. The Playground may return audio data that is not playable in the browser.
Which inputs does GPT Audio support?⌄
GPT Audio accepts text and audio and returns text. Through ModelFold you send text messages; documents attached in the Playground are converted to text.
How long is the context window of GPT Audio?⌄
Up to 128K tokens, shared between your input and the model’s output.
Does GPT Audio support function calling?⌄
Yes. GPT Audio supports tools / function calling through the standard tools parameter of the chat completions API.
How is GPT Audio billed on ModelFold?⌄
Pay as you go by tokens: input and output tokens are charged at the per-million-token prices shown on this page. There is no monthly fee, and failed requests are not charged.
How do I call GPT Audio through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "gpt-audio", using your ModelFold API key as the Bearer token.
| Input | 600 credits 1M tokens≈ $3.00 |
| Output | 2400 credits 1M tokens≈ $12.00 |
Billed per token: input and output are priced separately, and thinking tokens count as output. The Playground charges exactly the same way.
Read API docs →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"gpt-audio","messages":[{"role":"user","content":"Hello"}]}'