Updated 9 Nov · updated in the last 30 hours

Z.ai GLM 5.1: price rise input $0.966 → $1.40 per 1M tokens (+45 %), output $3.04 → $4.40 per 1M tokens (+45 %)

On the listed price of Z.ai GLM 5.1 changed: input $0.966 → $1.40 per 1M tokens (+45 %); output $3.04 → $4.40 per 1M tokens (+45 %). A later check on confirmed it. Prices as listed in the United States.

What changed

Z.ai GLM 5.1 is more expensive on OpenRouter. Source: price page as read.

What it does to a task

Standard tasks, visible output only, no cache discount; month = 20 tasks an hour around the clock.

Price change: Published input and output rates before and now; both money axes start at zero. Published rates · GLM 5.1 The same token volumes are priced before and after the confirmed rate change. Published rates · USD per million tokens. Open circle: before. Filled circle: now.
Price change.Published rates · GLM 5.1 The same token volumes are priced before and after the confirmed rate change. Published rates · USD per million tokens. Open circle: before. Filled circle: now. Open image · Explore the chart · Measured Lab · CC BY 4.0
See bill impact chart
TaskPer task, beforePer task, nowPer month, beforePer month, now
L1 · Micro-task (classification or strict JSON extraction)$0.0021$0.0030$30.02$43.51
L2 · Deep analysis over a 50,000-token document$0.163$0.236$2,375.45$3,442.68
L3 · Agentic coding loop, 15 steps$1.30$1.88$18,952.22$27,466.98

Same task on other models

The L2 task on other models we follow closely, at today's prices:

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Open the task cost calculator with this model and your own numbers. Model card with the full price history

Explore the numbers

Published rates · GLM 5.1

What the price change does to your bill

The same token volumes are priced before and after the confirmed rate change.

Input / 1M tokens$0.966 → $1.40$0.00$2.00$4.00$6.00Output / 1M tokens$3.036 → $4.40$0.00$2.00$4.00$6.00Input / 1M tokens$0.966 → $1.40$0.00$2.00$4.00$6.00Output / 1M tokens$3.036 → $4.40$0.00$2.00$4.00$6.00

Published rates · USD per million tokens. Open circle: before. Filled circle: now.

Before$2,375.45Now$3,442.68$0$1,000$2,000$3,000$4,000Before$2,375.45Now$3,442.68$0$1,000$2,000$3,000$4,000
Fresh inputVisible output

159,000 input + 3,000 visible output tokens per task. No cache discount; hidden reasoning excluded.

$1,067.23 more per month at 14,600 tasks.

Before$30.02Now$43.51$0$20$40$60Before$30.02Now$43.51$0$20$40$60
Fresh inputVisible output

1,500 input + 200 visible output tokens per task. No cache discount; hidden reasoning excluded.

$13.49 more per month at 14,600 tasks.

Before$18,952.22Now$27,466.98$0$10,000$20,000$30,000Before$18,952.22Now$27,466.98$0$10,000$20,000$30,000
Fresh inputVisible output

1,315,500 input + 9,000 visible output tokens per task. No cache discount; hidden reasoning excluded.

$8,514.76 more per month at 14,600 tasks.

Assumption: 20 tasks/hour × 730 hours. No cache discount; hidden reasoning excluded.

Read the price change briefing · Model and full price history

Confirmed price change

First seen and confirmed are different dates.

  1. Before
  2. First seen
  3. Confirmed
Published rate / 1MBeforeNow
Input$0.966$1.40
Output$3.036$4.40

A second measurement on a later date confirmed each new rate. The dates describe our readings, not a provider announcement date.

Sources: this page; published model prices (data (JSON)); task assumptions (data (JSON)). Published prices · Observed responses · Calculated scenarios · Assumptions stated with each chart.