Side-by-side comparison
o3 Mini vs GLM 5.1
| o3 Mini | GLM 5.1 | |
|---|---|---|
| Provider | OpenAI | Z.ai |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 200,000 | 202,752 |
| Capabilities Optional capabilities the model advertises: vision (images), tools (function calling), json_mode (structured output). | tools, json_mode | tools, json_mode |
| Input $ / 1M tokens Cost for tokens you send (prompt + context). Cheaper side highlighted. Glossary → | 1.1000 | 0.9800 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 4.4000 | 3.0800 |
Frequently asked questions
Which is cheaper, o3 Mini or GLM 5.1?
GLM 5.1 is cheaper than o3 Mini on a 50/50 input/output blend by about $0.72 per 1M tokens. Exact savings depend on your input-vs-output ratio — use the cost calculator on this page for a workload-specific estimate.
Which has a larger context window, o3 Mini or GLM 5.1?
GLM 5.1 has the larger context window at 203k tokens versus 200k tokens for o3 Mini. That means GLM 5.1 can ingest about 1.0x as much text per request.
What is the difference between o3 Mini and GLM 5.1?
o3 Mini comes from OpenAI; GLM 5.1 comes from Z.ai. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.