GLM-5.1 API Pricing
GLM-5.1 costs $1.38 per 1M input tokens and $4.40 per 1M output tokens. These rates were last verified on .
Published rates and billing units
| Billing dimension | USD list price |
|---|---|
| Input / 1M tokens | $1.38 |
| Cached input / 1M tokens | $0.26 |
| Output / 1M tokens | $4.40 |
Verified 2026-11-12 · Official source · Pricing methodology. Taxes, optional services and account-specific discounts are not included.
Cost examples
These examples use published list prices only. They exclude taxes, enterprise discounts, minimum charges, retries, batch discounts, and provider-specific billing rules.
1M input + 1M output
$5.78
A direct per-million comparison against every other text model.
100K input + 25K output
$0.248
A compact chat, summarization, or analysis workload.
10M input + 2M output
$22.60
A monthly production estimate for heavier RAG or agent traffic.
75% cached input + 250K output
$1.64
Cached input is about 81% cheaper than standard input at list price.
Calculator for GLM-5.1
Enter your own input, output, and cached-token assumptions. This calculator is preloaded with only GLM-5.1, so the result stays focused on this model.
Input cost
$1.38
Output cost
$4.40
Total
$5.78
Price history
No list-price movement across 114 daily snapshots from 2026-07-21 to 2026-11-11.
When to use GLM-5.1
Good fit
- reasoning-heavy prompts, planning, analysis, and multi-step tool use
Be careful with
- decisions that depend on unpublished context-window limits without checking the provider docs first