OpenAI o4-mini high vs GLM 5.1
Both have similar output pricing, while GLM 5.1 offers a larger context window. Choose OpenAI o4-mini high or GLM 5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | OpenAI o4-mini high | GLM 5.1 |
|---|---|---|
| Provider | NanoGPT | 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 |
| Aider Polyglot score | 72.0 | — |
| LiveBench score | — | 70.6 |
| FrontierMath score | — | 33.5 |
| LMArena (Chatbot Arena) Elo score | — | 1463 |
| LMArena WebDev Elo score | — | 1508 |
| GPQA Diamond score | — | 89.9 |
| Epoch Capabilities Index score | — | 150 |
FAQ
Is OpenAI o4-mini high or GLM 5.1 cheaper?
OpenAI o4-mini high and GLM 5.1 have comparable output pricing.
Which has the larger context window, OpenAI o4-mini high 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.