o4 Mini vs GLM 5.1
Both have similar output pricing, while GLM 5.1 offers a larger context window. Choose o4 Mini or GLM 5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | o4 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 | Apr 2025 | Apr 2026 |
| SWE-bench Multimodal score | 33.9 | — |
| GPQA Diamond score | 79.6 | 89.9 |
| FrontierMath score | 24.8 | 33.5 |
| SWE-bench Verified score | 64.6 | — |
| Epoch Capabilities Index score | 146 | 150 |
| LMArena (Chatbot Arena) Elo score | 1353 | 1463 |
| LMArena Vision Elo score | 1194 | — |
| LiveBench score | — | 70.6 |
| LMArena WebDev Elo score | — | 1508 |
FAQ
Is o4 Mini or GLM 5.1 cheaper?
o4 Mini and GLM 5.1 have comparable output pricing.
Which has the larger context window, o4 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.