Llama 3.1.8 B Instruct vs GLM Flash Latest: cost comparison
Prices updated 2026-10-31 · computed from live provider data
Short answer: Llama 3.1.8 B Instruct is cheaper on a
3:1 input/output blend — $0.029 per million tokens versus
$0.048, a 40% difference.
GLM Flash Latest offers the larger context window at 1,048,576 tokens, against 131,072 for Llama 3.1.8 B Instruct.
Head to head
| Llama 3.1.8 B Instruct | GLM Flash Latest | |
|---|---|---|
| Input, per 1M tokens | $0.025 | $0.026 |
| Output, per 1M tokens | $0.040 | $0.114 |
| Blended 3:1, per 1M | $0.029 | $0.048 |
| Context window | 131,072 | 1,048,576 |
| Vendor | lambda_ai | z-ai |
Monthly cost at real volumes
| Workload (input / output) | Llama 3.1.8 B Instruct | GLM Flash Latest |
|---|---|---|
| 1M in / 250K out | $0.035 | $0.054 |
| 10M in / 2.5M out | $0.350 | $0.544 |
| 100M in / 25M out | $3.50 | $5.45 |
Which should you pick?
Pick GLM Flash Latest when you need the longer context window (1,048,576 vs 131,072 tokens). Pick Llama 3.1.8 B Instruct when price per token dominates your workload — high-volume classification, extraction, or batch summarisation.