Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | GLM-5.1 (Reasoning) | GPT-5.4 mini (xhigh) |
|---|---|---|
| Input ($/M tokens) | $1.4 | $0.75 |
| Output ($/M tokens) | $4.4 | $4.5 |
Data from Artificial Analysis API — 12 benchmarks
GPT-5.4 mini (xhigh) is cheaper overall. Its blended price (3:1 input/output ratio) is $1.69/M tokens vs $2.15/M for GLM-5.1 (Reasoning).
GPT-5.4 mini (xhigh) wins 4 out of 12 benchmarks compared to 3 for GLM-5.1 (Reasoning). See the detailed benchmark chart above for per-category results.
GPT-5.4 mini (xhigh) generates tokens faster at 159 tok/s vs 79 tok/s. GLM-5.1 (Reasoning) also has lower time-to-first-token (1.08s vs 6.03s).
Choose based on your priorities: GPT-5.4 mini (xhigh) for lower cost, GPT-5.4 mini (xhigh) for stronger benchmark performance, and GPT-5.4 mini (xhigh) for faster generation. For latency-sensitive apps, check the TTFT comparison above.