o3 Mini vs GLM 5.3
o3 Mini is cheaper on output tokens, while GLM 5.3 offers a larger context window. Choose o3 Mini or GLM 5.3 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | o3 Mini | GLM 5.3 |
|---|---|---|
| Provider | OpenAI | Z.ai |
| Input / 1M tokens | $1.10 | $0.08 |
| Output / 1M tokens | $4.40 | $4.80 |
| Context window | 200K | 1M |
| Parameters | — | — |
| Open weights | No | — |
| Released | Dec 2024 | — |
| Aider Polyglot score | 60.4 | — |
| GPQA Diamond score | 77.0 | 90.9 |
| FrontierMath score | 12.4 | — |
| SWE-bench Verified score | 42.4 | — |
| Epoch Capabilities Index score | 140 | 156 |
| LMArena (Chatbot Arena) Elo score | 1337 | 1471 |
| LMArena WebDev Elo score | — | 1621 |
FAQ
Is o3 Mini or GLM 5.3 cheaper?
o3 Mini is cheaper on output tokens ($4.40 vs $4.80 per 1M).
Which has the larger context window, o3 Mini or GLM 5.3?
GLM 5.3 has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.