GPT Audio 1.5
OpenAI · text, audio → text
The gpt-audio model is OpenAI's first officially released (generally available) audio model. It supports audio input and output and can be used in Chat Completions.
Input$2.50 /M
Output$10.00 /M
← ModelsGPT Audio 1.5
Grok 4.5
GPT Audio 1.5 vs Grok 4.5
Output tokens cost $10.00 per million on GPT Audio 1.5 and $6.00 per million on Grok 4.5. Input tokens cost $2.50 per million on GPT Audio 1.5 and $2.00 per million on Grok 4.5. Cached input tokens are billed at $2.50 per million on GPT Audio 1.5 and $0.50 per million on Grok 4.5. Context lengths are 128,000 tokens on GPT Audio 1.5 and 500,000 tokens on Grok 4.5.
GPT Audio 1.5Grok 4.5+ Add model · 2/4
Grok 4.5
Grok · text, image → text
Grok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.
Input$2.00 /M
Output$6.00 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
GPT Audio 1.5
Grok 4.5
Input /M
$2.50
$2.00
Output /M
$10.00
$6.00
Cache read /M
$2.50
$0.50
Context length
128,000
500,000
Max output
16,384
500,000
Time to First Token
-
1.7 s
Throughput
-
26.6 tok/s
Modalities
textaudio
textimage
Supported Parameters
thinkingfunction callingstructured outputs
thinkingtoolsfunction callingstructured outputslong context
API Formats
Released
-
July 2026
Promotional prices show the discounted rate; see each model page for promotion windows.
Activity Past 30 Days
Daily traffic served through AIHubMix — how demand for each model is trending.
gpt-audio-1.5grok-4.5
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
gpt-audio-1.5grok-4.5
Throughput (tok/s)
-
TTFT (s)
-
Uptime (%)
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Cost calculator
Estimate your monthly bill for the same workload on each model.
Grok 4.5
$210 /mo
GPT Audio 1.5
$300 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT Audio 1.5, Grok 4.5?
Grok 4.5: $6.00/M output tokens; GPT Audio 1.5: $10.00/M. Use the cost calculator above to estimate your own workload.
How large is each context window?
GPT Audio 1.5 accepts 128,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 16,384 tokens on GPT Audio 1.5 and 500,000 tokens on Grok 4.5.
What inputs and capabilities does each model support?
GPT Audio 1.5 accepts text and audio input and supports thinking, function calling and structured outputs; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
Can I call GPT Audio 1.5 and Grok 4.5 with the same API key?
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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