Ui Tars 1.5.7 B vs Gemini 2.5 Flash Lite: cost comparison
Prices updated 2026-10-27 · computed from live provider data
Short answer: Ui Tars 1.5.7 B is cheaper on a
3:1 input/output blend — $0.125 per million tokens versus
$0.175, a 29% difference.
Gemini 2.5 Flash Lite offers the larger context window at 1,048,576 tokens, against 128,000 for Ui Tars 1.5.7 B.
Head to head
| Ui Tars 1.5.7 B | Gemini 2.5 Flash Lite | |
|---|---|---|
| Input, per 1M tokens | $0.100 | $0.100 |
| Output, per 1M tokens | $0.200 | $0.400 |
| Blended 3:1, per 1M | $0.125 | $0.175 |
| Context window | 128,000 | 1,048,576 |
| Vendor | bytedance |
Monthly cost at real volumes
| Workload (input / output) | Ui Tars 1.5.7 B | Gemini 2.5 Flash Lite |
|---|---|---|
| 1M in / 250K out | $0.150 | $0.200 |
| 10M in / 2.5M out | $1.50 | $2.00 |
| 100M in / 25M out | $15.00 | $20.00 |
Which should you pick?
Pick Gemini 2.5 Flash Lite when you need the longer context window (1,048,576 vs 128,000 tokens). Pick Ui Tars 1.5.7 B when price per token dominates your workload — high-volume classification, extraction, or batch summarisation.