GLM 5.3 Flash is cheaper than o1 at $0.15/M vs $15/M input tokens.
| Spec | GLM 5.3 Flash | o1 |
|---|---|---|
| Input price | $0.15/M tokens | $15/M tokens |
| Output price | $0.5/M tokens | $60/M tokens |
| Context window | 1.3M tokens | 128K tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Aug 2026 | Dec 2024 |
Not enough votes to call it. On the specs, GLM 5.3 Flash has the edge: bigger model tier, newer, bigger context window.
GLM 5.3 Flash costs 120x less per token.
GLM 5.3 Flash is cheaper on both: 100× input, 120× output.
Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.