Output tokens cost $3.94 per million on GLM 5.2 and $10.00 per million on GPT 4o Audio Preview. Input tokens cost $1.13 per million on GLM 5.2 and $2.50 per million on GPT 4o Audio Preview. Cached input tokens are billed at $0.28 per million on GLM 5.2 and $2.50 per million on GPT 4o Audio Preview. Context lengths are 1,000,000 tokens on GLM 5.2 and 128,000 tokens on GPT 4o Audio Preview. Time to first token (TTFT) measured on AIHubMix is 1.1s on GLM 5.2 and 2.5s on GPT 4o Audio Preview. Measured output throughput is 36.9 tok/s on GLM 5.2 and 10.4 tok/s on GPT 4o Audio Preview.
GLM 5.2
GPT 4o Audio PreviewGLM-5.2 is Z.ai’s flagship model for the era of long-horizon tasks. With a truly usable 1M-token context window, it can handle project-level engineering context, execute long-running tasks more reliably, follow engineering standards more consistently, and complete the full development workflow from requirements to multi-platform deployment in a single task.
OpenAI 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.
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.
GLM 5.2: $3.94/M output tokens; GPT 4o Audio Preview: $10.00/M. Use the cost calculator above to estimate your own workload.
GLM 5.2: 1.1s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
GLM 5.2 accepts 1,000,000 and GPT 4o Audio Preview accepts 128,000 input tokens. Maximum output per request is 128,000 tokens on GLM 5.2 and 16,384 tokens on GPT 4o Audio Preview.
GLM 5.2 at 36.9 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.
GLM 5.2 accepts text input and supports thinking, tool calling, function calling and structured outputs; GPT 4o Audio Preview accepts text and audio input.
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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