Side-by-side comparison
GLM 4.5 Air vs Mercury 2
| GLM 4.5 Air | Mercury 2 | |
|---|---|---|
| Provider | Z.ai | Inception |
| Context window Maximum tokens (input + output) the model can process in a single request. Glossary → | 131,072 | 128,000 |
| Capabilities Optional capabilities the model advertises: vision (images), tools (function calling), json_mode (structured output). | tools | tools, json_mode |
| Input $ / 1M tokens Cost for tokens you send (prompt + context). Cheaper side highlighted. Glossary → | 0.1300 | 0.2500 |
| Output $ / 1M tokens Cost for tokens the model generates. Output is normally 3–5× pricier than input. Glossary → | 0.8500 | 0.7500 |
Frequently asked questions
Which is cheaper, GLM 4.5 Air or Mercury 2?
GLM 4.5 Air is cheaper than Mercury 2 on a 50/50 input/output blend by about $0.01 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, GLM 4.5 Air or Mercury 2?
GLM 4.5 Air has the larger context window at 131k tokens versus 128k tokens for Mercury 2. That means GLM 4.5 Air can ingest about 1.0x as much text per request.
What is the difference between GLM 4.5 Air and Mercury 2?
GLM 4.5 Air comes from Z.ai; Mercury 2 comes from Inception. They differ in pricing, context window, and supported capabilities — see the side-by-side table on this page for the exact figures, refreshed nightly.