Output tokens cost $10.00 per million on GPT 4o Audio Preview and $6.00 per million on Grok 4.5. Input tokens cost $2.50 per million on GPT 4o Audio Preview and $2.00 per million on Grok 4.5. Cached input tokens are billed at $2.50 per million on GPT 4o Audio Preview and $0.50 per million on Grok 4.5. Context lengths are 128,000 tokens on GPT 4o Audio Preview and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 2.5s on GPT 4o Audio Preview and 1.8s on Grok 4.5. Measured output throughput is 10.4 tok/s on GPT 4o Audio Preview and 26.8 tok/s on Grok 4.5.
GPT 4o Audio Preview
Grok 4.5OpenAI voice input and output model, with prices consistent with the official ones. For now, only the text portion prices are displayed; voice prices can be found on the official OpenAI website. Backend billing is the same as the official.
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.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
Grok 4.5: $6.00/M output tokens; GPT 4o Audio Preview: $10.00/M. Use the cost calculator above to estimate your own workload.
Grok 4.5: 1.8s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
GPT 4o Audio Preview accepts 128,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 16,384 tokens on GPT 4o Audio Preview and 500,000 tokens on Grok 4.5.
Grok 4.5 at 26.8 tok/s and GPT 4o Audio Preview at 10.4 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
GPT 4o Audio Preview accepts text and audio input; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
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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