token.app › Compare › GPT-5.3-Codex vs GLM 5.2
GPT-5.3-Codex vs GLM 5.2
GLM 5.2 leads on 1 of 1 shared benchmarks. GLM 5.2 is 12× cheaper per token on a blended 3:1 basis. GLM 5.2 accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.3-Codex | GLM 5.2 | |
|---|---|---|
| Provider | OpenAI | Zhipu AI |
| Input $/1M | $1.75 | $0.252 |
| Output $/1M | $14.00 | $0.792 |
| Blended $/1M | $4.81 | $0.387 |
| Context window | 400K | 1.0M |
| Max output | 128K | 128K |
| Released | Feb 2026 | Jun 2026 |
| Licence | Proprietary | Open weights |
| SWE-bench Verified | 74.8% | 78.7% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose GPT-5.3-Codex if…
- No clear advantage on the data we hold.
Choose GLM 5.2 if…
- Costs less per token — $0.387 vs $4.81 blended
- Higher SWE-bench Verified (78.7% vs 74.8%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, GPT-5.3-Codex or GLM 5.2?
Across the 1 benchmark both models have independently-run scores for, GPT-5.3-Codex leads on 0 and GLM 5.2 leads on 1. Benchmarks are one input — price and context window are on this page too.
Is GPT-5.3-Codex cheaper than GLM 5.2?
GLM 5.2 is cheaper: $0.387 versus $4.81 per million tokens blended at 3:1 input:output. Input alone: $1.75 vs $0.252. Output alone: $14.00 vs $0.792.
What context windows do GPT-5.3-Codex and GLM 5.2 have?
GPT-5.3-Codex: 400,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes GPT-5.3-Codex and GLM 5.2?
GPT-5.3-Codex is made by OpenAI. GLM 5.2 is made by Zhipu AI.