Gemini 3.5 Flash vs GLM 5.3 Prime
Gemini 3.5 Flash 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
- Gemini 3.5 Flash is 1.3× cheaper than GLM 5.3 Prime for the same mix of input and output tokens.
- Gemini 3.5 Flash has the larger context window (1M), useful for long documents and big codebases.
- GLM 5.3 Prime is the more recent release (Sep 23, 2026).
- Only Gemini 3.5 Flash accepts images as input.
- Choose Gemini 3.5 Flash if cost matters most; choose GLM 5.3 Prime if you need its specific strengths above. For the best results, test both on your own prompts.
| Gemini 3.5 Flash | GLM 5.3 Prime | |
|---|---|---|
| Company | Google DeepMind | Z.ai (Zhipu) |
| Released | May 19, 2026 | Sep 23, 2026 ● |
| Overall index | 154.6 | — |
| SWE-bench Verified | 79.3% | — |
| GPQA Diamond | 92.8% | — |
| AIME math | 95.6% | — |
| FrontierMath | 62.8% | — |
| SimpleQA Verified | 66.2% | — |
| Input (per 1M tokens) | $1.50 ● | $2.80 |
| Output (per 1M tokens) | $9 | $8.80 ● |
| Cost for 1M input + 1M output tokens | $10.50 ● | $11.60 |
| Providers | 7 ● | 1 |
| Context | 1M ● | 1M |
| Max output | 64K | 128K ● |
| Inputs | Text, Image, Video, Files, Audio ● | Text |
| Outputs | Text | Text |
| Reasoning | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Open weights | — | — |