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A side-by-side comparison of GLM 5.1 and OpenAI: GPT-5.3-Codex, using the lowest price and highest limits found across every provider that offers each model.
| GLM 5.1 | OpenAI: GPT-5.3-Codex | |
|---|---|---|
| Providers | 57 | 41 |
| Cheapest input ($/M) | $0.45 via Naga | $0.1504 via QiHang AI |
| Cheapest output ($/M) | $1.45 via Naga | $1.2031 via QiHang AI |
| Max context | 1M | 512K |
| Max output | 202.8K | 128K |
| Released | Mar 27, 2026 | Feb 5, 2026 |
| Open weights | Yes | No |
| Features | ReasoningToolsStructured outputTemperature | ReasoningToolsStructured outputFiles |
| Input modalities | Text | ImageText |
| Output modalities | Text | Text |