GLM-5.2 vs GPT-5.3-Codex
GPT-5.3-Codex leads in 2 of 8 categories
Arena ELO
Tie
Cheaper
GPT-5.3-Codex
Faster
Tie
Detailed Comparison
| Category | GLM-5.2 | GPT-5.3-Codex |
|---|---|---|
| Provider | Z.ai | OpenAI |
| Context Window | 128K | 128K |
| Input Price ($/1M) | $3 | $1.75 WIN |
| Output Price ($/1M) | $80 | $14 WIN |
| Arena ELO | N/A | N/A |
| Coding | N/A | N/A |
| Reasoning | N/A | N/A |
| Speed (tokens/sec) | N/A | N/A |
| Open Source | Yes | No |
Frequently Asked Questions
Which is cheaper, GLM-5.2 or GPT-5.3-Codex?
GPT-5.3-Codex is approximately 81% cheaper than GLM-5.2 per million tokens.
Which has a larger context window?
GLM-5.2 supports 128K context, while GPT-5.3-Codex supports 128K.
Is GLM-5.2 or GPT-5.3-Codex open source?
GLM-5.2 is open source. GPT-5.3-Codex is proprietary.
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