token.app › Compare › o3 Pro vs GLM 5.2
o3 Pro vs GLM 5.2
GLM 5.2 is 90× 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
| o3 Pro | GLM 5.2 | |
|---|---|---|
| Provider | OpenAI | Zhipu AI |
| Input $/1M | $20.00 | $0.252 |
| Output $/1M | $80.00 | $0.792 |
| Blended $/1M | $35.00 | $0.387 |
| Context window | 200K | 1.0M |
| Max output | 100K | 128K |
| Released | Jun 2025 | Jun 2026 |
| Licence | Proprietary | Open weights |
Choose o3 Pro if…
- No clear advantage on the data we hold.
Choose GLM 5.2 if…
- Costs less per token — $0.387 vs $35.00 blended
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, o3 Pro or GLM 5.2?
We do not hold independently-run benchmark scores covering both o3 Pro and GLM 5.2, so we make no quality claim. Their pricing and specifications are compared on this page.
Is o3 Pro cheaper than GLM 5.2?
GLM 5.2 is cheaper: $0.387 versus $35.00 per million tokens blended at 3:1 input:output. Input alone: $20.00 vs $0.252. Output alone: $80.00 vs $0.792.
What context windows do o3 Pro and GLM 5.2 have?
o3 Pro: 200,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes o3 Pro and GLM 5.2?
o3 Pro is made by OpenAI. GLM 5.2 is made by Zhipu AI.