Output tokens cost $3.94 per million on GLM 5.2 and $10.00 per million on GPT Audio 1.5. Input tokens cost $1.13 per million on GLM 5.2 and $2.50 per million on GPT Audio 1.5. Cached input tokens are billed at $0.28 per million on GLM 5.2 and $2.50 per million on GPT Audio 1.5. Context lengths are 1,000,000 tokens on GLM 5.2 and 128,000 tokens on GPT Audio 1.5.
GLM 5.2
GPT Audio 1.5GLM-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.
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.
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 Audio 1.5: $10.00/M. Use the cost calculator above to estimate your own workload.
GLM 5.2 accepts 1,000,000 and GPT Audio 1.5 accepts 128,000 input tokens. Maximum output per request is 128,000 tokens on GLM 5.2 and 16,384 tokens on GPT Audio 1.5.
GLM 5.2 accepts text input and supports thinking, tool calling, function calling and structured outputs; GPT Audio 1.5 accepts text and audio input and supports thinking, function calling and structured outputs.
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.
Related model match-ups readers also look at.
AIHubMix