Qwen 3.5.9 B vs Phi 4: cost comparison
Prices updated 2026-11-12 · computed from live provider data
Short answer: Qwen 3.5.9 B is cheaper on a
3:1 input/output blend — $0.078 per million tokens versus
$0.087, a 11% difference.
Qwen 3.5.9 B offers the larger context window at 262,144 tokens, against 16,384 for Phi 4.
Head to head
| Qwen 3.5.9 B | Phi 4 | |
|---|---|---|
| Input, per 1M tokens | $0.070 | $0.070 |
| Output, per 1M tokens | $0.103 | $0.140 |
| Blended 3:1, per 1M | $0.078 | $0.087 |
| Context window | 262,144 | 16,384 |
| Vendor | qwen | microsoft |
Monthly cost at real volumes
| Workload (input / output) | Qwen 3.5.9 B | Phi 4 |
|---|---|---|
| 1M in / 250K out | $0.096 | $0.105 |
| 10M in / 2.5M out | $0.958 | $1.05 |
| 100M in / 25M out | $9.57 | $10.50 |
Which should you pick?
Pick Qwen 3.5.9 B when you need the longer context window (262,144 vs 16,384 tokens). Pick Qwen 3.5.9 B when price per token dominates your workload — high-volume classification, extraction, or batch summarisation.