Output tokens cost $3.94 per million on GLM 5.2 and $120.00 per million on GPT 5 Pro. Input tokens cost $1.13 per million on GLM 5.2 and $15.00 per million on GPT 5 Pro. Cached input tokens are billed at $0.28 per million on GLM 5.2 and $15.00 per million on GPT 5 Pro. Context lengths are 1,000,000 tokens on GLM 5.2 and 400,000 tokens on GPT 5 Pro. Time to first token (TTFT) measured on AIHubMix is 0.6s on GLM 5.2 and 313.1s on GPT 5 Pro. Measured output throughput is 41.5 tok/s on GLM 5.2 and 8.6 tok/s on GPT 5 Pro.
GLM 5.2
GPT 5 ProGLM-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.
GPT-5 pro uses more compute to think harder and provide consistently better answers. GPT-5 pro is available in the Responses API only to enable support for multi-turn model interactions before responding to API requests, and other advanced API features in the future. Since GPT-5 pro is designed to tackle tough problems, some requests may take several minutes to finish. To avoid timeouts, try using background mode. As our most advanced reasoning model, GPT-5 pro defaults to (and only supports) reasoning.effort: high. GPT-5 pro does not support code interpreter.
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 5 Pro: $120.00/M. Use the cost calculator above to estimate your own workload.
GLM 5.2: 0.6s 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 5 Pro accepts 400,000 input tokens. Maximum output per request is 128,000 tokens on GLM 5.2 and 128,000 tokens on GPT 5 Pro.
GLM 5.2 at 41.5 tok/s and GPT 5 Pro at 8.6 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 5 Pro accepts text and image input and supports thinking, tool calling, 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.
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