Model detail
GPT-Audio-1.5
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
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API endpoints
One MixRoute gateway, OpenAI-compatible
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OpenAI-compatible
/v1/chat/completionsPOST
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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
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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.
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Capabilities & compatibility
Unconfirmed capabilities stay "Unknown," no guesses
Tool calling
GPT-Audio-1.5 supports function and tool calls.
tools definition; the response returns tool_calls to execute and feed results back.
Streaming
GPT-Audio-1.5 supports streamed responses.
stream: true streams tokens incrementally, so chat UIs render as they arrive.
OpenAI SDK
Call GPT-Audio-1.5 through MixRoute's OpenAI-compatible endpoint.
base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.
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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
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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.