token.app › Compare › GPT-5.3 Chat vs GLM 5.2
GPT-5.3 Chat vs GLM 5.2
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 Chat | 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 | 128K | 1.0M |
| Max output | 16K | 128K |
| Released | Mar 2026 | Jun 2026 |
| Licence | Proprietary | Open weights |
Choose GPT-5.3 Chat if…
- No clear advantage on the data we hold.
Choose GLM 5.2 if…
- Costs less per token — $0.387 vs $4.81 blended
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, GPT-5.3 Chat or GLM 5.2?
We do not hold independently-run benchmark scores covering both GPT-5.3 Chat and GLM 5.2, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT-5.3 Chat 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 Chat and GLM 5.2 have?
GPT-5.3 Chat: 128,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes GPT-5.3 Chat and GLM 5.2?
GPT-5.3 Chat is made by OpenAI. GLM 5.2 is made by Zhipu AI.