Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | o3-mini | GLM-5.1 (Reasoning) |
|---|---|---|
| Input ($/M tokens) | $1.1 | $1.4 |
| Output ($/M tokens) | $4.4 | $4.4 |
Data from Artificial Analysis API — 12 benchmarks
o3-mini is cheaper overall. Its blended price (3:1 input/output ratio) is $1.93/M tokens vs $2.15/M for GLM-5.1 (Reasoning).
GLM-5.1 (Reasoning) wins 7 out of 12 benchmarks compared to 3 for o3-mini. See the detailed benchmark chart above for per-category results.
o3-mini generates tokens faster at 167 tok/s vs 54 tok/s. However, GLM-5.1 (Reasoning) has lower time-to-first-token (0.86s vs 6.02s).
Choose based on your priorities: o3-mini for lower cost, GLM-5.1 (Reasoning) for stronger benchmark performance, and o3-mini for faster generation. For latency-sensitive apps, check the TTFT comparison above.