Updated March 26, 2026· Based on independent benchmark data
Gemini 3.1 Pro Preview leads in intelligence with a score of 57.2 vs 23.2. GLM-4.5-Air is 10.0x cheaper at $0.20/1M tokens vs $2.00/1M.
| Metric | GLM-4.5-Air | Gemini 3.1 Pro Preview |
|---|---|---|
| Intelligence Score | 23.2 | 57.2 |
| Coding Score | 23.8 | 55.5 |
| Math Score | 80.7 | N/A |
| Speed (tok/s) | 104 tok/s | 113 tok/s |
| Latency (TTFT) | 0.64s | 23.84s |
| Input Price / 1M tokens | $0.20 | $2.00 |
| Output Price / 1M tokens | $1.10 | $12 |
| Context Window | N/A |
Gemini 3.1 Pro Preview outperforms GLM-4.5-Air on the intelligence index with a score of 57.2 compared to 23.2. For coding tasks, Gemini 3.1 Pro Preview has the edge with a coding score of 55.5 vs 23.8.
Both models deliver similar output speeds: GLM-4.5-Air at 104 tok/s and Gemini 3.1 Pro Preview at 113 tok/s. Time to first token is 0.64s for GLM-4.5-Air vs 23.84s for Gemini 3.1 Pro Preview, which affects perceived responsiveness in interactive applications.
GLM-4.5-Air is more affordable at $0.20/1M input tokens ($1.10/1M output), while Gemini 3.1 Pro Preview costs $2.00/1M input ($12/1M output). That makes Gemini 3.1 Pro Preview 10.0x more expensive per token, which can add up significantly at scale. For a typical workload of 100 requests per day at 2,000 tokens each, GLM-4.5-Air would cost approximately $1.20/month vs $12.00/month for Gemini 3.1 Pro Preview in input costs alone.
Choose GLM-4.5-Air when you need lower cost. Choose Gemini 3.1 Pro Preview when you need higher intelligence (57.2), stronger coding performance (55.5).
Gemini 3.1 Pro Preview scores higher on coding benchmarks (55.5 vs 23.8), making it the better choice for programming tasks.
GLM-4.5-Air is cheaper at $0.20/1M input tokens vs $2.00/1M for Gemini 3.1 Pro Preview.
Gemini 3.1 Pro Preview is faster, producing output at 113 tok/s compared to GLM-4.5-Air's 104 tok/s.
No, GLM-4.5-Air does not support image input. However, Gemini 3.1 Pro Preview does support images.
Data last synced: March 26, 2026
| 1.0M |
| Max Output Tokens | N/A | N/A |
| Input Modalities | Text | Audio + File + Image + Text + Video |
| Output Modalities | Text | Text |
| Free Tier | No | No |
It depends on your priorities. Gemini 3.1 Pro Preview scores higher on intelligence (57.2), but GLM-4.5-Air may be better for specific use cases like budget-conscious projects or speed-critical applications.