Gemini 3.1 Flash Lite vs GLM 4.5 Air: cost comparison
Prices updated 2026-10-28 · computed from live provider data
Short answer: Gemini 3.1 Flash Lite is cheaper on a
3:1 input/output blend — $0.281 per million tokens versus
$0.310, a 9% difference.
Gemini 3.1 Flash Lite offers the larger context window at 1,048,576 tokens, against 131,072 for GLM 4.5 Air.
Head to head
| Gemini 3.1 Flash Lite | GLM 4.5 Air | |
|---|---|---|
| Input, per 1M tokens | $0.125 | $0.130 |
| Output, per 1M tokens | $0.750 | $0.850 |
| Blended 3:1, per 1M | $0.281 | $0.310 |
| Context window | 1,048,576 | 131,072 |
| Vendor | z-ai |
Monthly cost at real volumes
| Workload (input / output) | Gemini 3.1 Flash Lite | GLM 4.5 Air |
|---|---|---|
| 1M in / 250K out | $0.312 | $0.343 |
| 10M in / 2.5M out | $3.12 | $3.42 |
| 100M in / 25M out | $31.25 | $34.25 |
Which should you pick?
Pick Gemini 3.1 Flash Lite when you need the longer context window (1,048,576 vs 131,072 tokens). Pick Gemini 3.1 Flash Lite when price per token dominates your workload — high-volume classification, extraction, or batch summarisation.