o3 Mini vs GLM 5.1
Both have similar output pricing, while GLM 5.1 offers a larger context window. Choose o3 Mini or GLM 5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | o3 Mini | GLM 5.1 |
|---|---|---|
| Provider | OpenAI | Z.ai |
| Input / 1M tokens | $1.10 | $1.40 |
| Output / 1M tokens | $4.40 | $4.40 |
| Context window | 200K | 205K |
| Parameters | — | 754B |
| Open weights | No | — |
| Released | Dec 2024 | Apr 2026 |
| Aider Polyglot score | 60.4 | — |
| GPQA Diamond score | 77.0 | 89.9 |
| FrontierMath score | 12.4 | 33.5 |
| SWE-bench Verified score | 42.4 | — |
| LMArena (Chatbot Arena) Elo score | 1337 | 1463 |
| Epoch Capabilities Index score | 140 | 150 |
| LiveBench score | — | 70.6 |
| LMArena WebDev Elo score | — | 1508 |
FAQ
Is o3 Mini or GLM 5.1 cheaper?
o3 Mini and GLM 5.1 have comparable output pricing.
Which has the larger context window, o3 Mini or GLM 5.1?
GLM 5.1 has the larger context window (205K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.