GLM-5.1 API price history
GLM-5.1 (Z AI) currently costs $1.40 per million input tokens and $4.40 per million output tokens. No price change has been observed since tracking began on 2026-05-11. Confirmed unchanged as of 2026-06-15.
Price timeline
Single observed price point — the line shows the price holding steady from first observation through the latest weekly verification.
Every observed price point
| Observed | Input / Mtok | Output / Mtok | Cache read / Mtok | Source |
|---|---|---|---|---|
| $1.40 | $4.40 | $0.26 | archive backfill |
Dates are when our snapshot observed the price, not necessarily the vendor's announcement date. Prices from each lab's official pricing page, per million tokens.
Get price-change alerts
One email when a tracked model's API price changes, a frontier model ships, or a model is deprecated. No noise.