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Model detail

GPT-Audio-1.5

Provided by OpenAI
Pay-as-you-go

OpenAI's GPT-Audio 1.5 voice model accepts and generates audio for voice-oriented interactions through the Chat Completions API.

Model specs

Model ID
gpt-audio-1.5
Context length
128K
Max output
16.384K
I/O modalities
Released
2026-02

02

API endpoints

One MixRoute gateway, OpenAI-compatible

  • OpenAI-compatible /v1/chat/completions POST

03

Pricing

Flat rate, unit: /1M Tokens

Input

$2.5000 /1M Tokens

Completion

$10.0000 /1M Tokens

Audio input

$32.0000 /1M Tokens

Audio completion

$5.0000 /1M Tokens

05

Selection summary

Quickly judge whether it fits your workload

What is this model good for?

OpenAI's GPT-Audio 1.5 voice model

OpenAI's GPT-Audio 1.5 voice model accepts and generates audio for voice-oriented interactions through the Chat Completions API.

What should you check before using it?

Confirm audio formats, sample rates, and pricing

GPT-Audio-1.5 supports tool calling, streaming and the OpenAI SDK. Knowledge cutoff: 2024-09-30. Released 2026-02-23. The audio input price is $32.0000 per 1M tokens. Test a representative workload before production.

Why use it through MixRoute?

GPT-Audio-1.5 runs tools and structured output here

Tool calling and structured output run on that route as well. MixRoute serves GPT-Audio-1.5 on the OpenAI-compatible endpoint /v1/chat/completions; point your existing client at https://api.mixroute.ai/v1 with the model ID gpt-audio-1.5 and re-run your integration tests.

07

Capabilities & compatibility

Unconfirmed capabilities stay "Unknown," no guesses

Available:

Tool calling

GPT-Audio-1.5 supports function and tool calls.

EX Send a tools definition; the response returns tool_calls to execute and feed results back.
Available:

Streaming

GPT-Audio-1.5 supports streamed responses.

EX stream: true streams tokens incrementally, so chat UIs render as they arrive.
Available:

OpenAI SDK

Call GPT-Audio-1.5 through MixRoute's OpenAI-compatible endpoint.

EX Change base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.

08

Token cost estimator

Live estimate from this page's pricing, not an actual bill

This model has no cache-read price; caching is not counted

09

FAQ

gpt-audio-1.5 is an updated version of OpenAI’s first generally available audio model. It accepts audio inputs and outputs via the Chat Completions REST API.

One endpoint, a testable decision

Test this model and alternate routes with the same request format

Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.