GPT-6 Astra vs GLM 5.3 Prime
GPT-6 Astra vs GLM 5.3 Prime: which AI model is cheaper, has the larger context window and more capabilities? Side-by-side comparison updated daily.
Quick verdict
- GLM 5.3 Prime is 4.7× cheaper than GPT-6 Astra for the same mix of input and output tokens.
- GPT-6 Astra has the larger context window (1.1M), useful for long documents and big codebases.
- GLM 5.3 Prime is the more recent release (Sep 23, 2026).
- Only GPT-6 Astra accepts images as input.
- Choose GLM 5.3 Prime if cost matters most; choose GPT-6 Astra if you need its specific strengths above. For the best results, test both on your own prompts.
| GPT-6 Astra | GLM 5.3 Prime | |
|---|---|---|
| Company | OpenAI | Z.ai (Zhipu) |
| Released | Sep 4, 2026 | Sep 23, 2026 ● |
| Overall index | 166.6 | — |
| GPQA Diamond | 95.8% | — |
| AIME math | 100% | — |
| FrontierMath | 93.7% | — |
| SimpleQA Verified | 75.6% | — |
| Input (per 1M tokens) | $10 | $2.80 ● |
| Output (per 1M tokens) | $50 | $8.80 ● |
| Cost for 1M input + 1M output tokens | $60.00 | $11.60 ● |
| Providers | 7 ● | 1 |
| Context | 1.1M ● | 1M |
| Max output | 128K | 128K ● |
| Inputs | Files, Image, Text ● | Text |
| Outputs | Text | Text |
| Reasoning | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Open weights | — | — |