Qwen 3.5.9 B vs Qwen 3.5 Flash: cost comparison
Prices updated 2026-11-06 · computed from live provider data
Short answer: Qwen 3.5.9 B is cheaper on a
3:1 input/output blend — $0.100 per million tokens versus
$0.160, a 37% difference.
Qwen 3.5 Flash offers the larger context window at 995,904 tokens, against 262,144 for Qwen 3.5.9 B.
Head to head
| Qwen 3.5.9 B | Qwen 3.5 Flash | |
|---|---|---|
| Input, per 1M tokens | $0.090 | $0.090 |
| Output, per 1M tokens | $0.130 | $0.368 |
| Blended 3:1, per 1M | $0.100 | $0.160 |
| Context window | 262,144 | 995,904 |
| Vendor | empiriolabs | empiriolabs |
Monthly cost at real volumes
| Workload (input / output) | Qwen 3.5.9 B | Qwen 3.5 Flash |
|---|---|---|
| 1M in / 250K out | $0.122 | $0.182 |
| 10M in / 2.5M out | $1.23 | $1.82 |
| 100M in / 25M out | $12.25 | $18.20 |
Which should you pick?
Pick Qwen 3.5 Flash when you need the longer context window (995,904 vs 262,144 tokens). Pick Qwen 3.5.9 B when price per token dominates your workload — high-volume classification, extraction, or batch summarisation.