Z.ai: GLM 5.1
Listed on OpenRouter as z-ai/glm-5.1 since Apr 7, 2026. 94 snapshot observations, 16 repricings.
$1.48per 1M blended · $0.97 in / $3.04 out
USD per 1M tokens · blended at 3 input : 1 output · at this price for 2 days (since Oct 7, 2026)
All-time low$1.46Aug 6, 2026
All-time high$2.15Aug 10, 2026
Change since first seen-4.3%$1.55 on Apr 7, 2026
Listed price over time
| Observed | Input | Output | Blended | Change |
|---|---|---|---|---|
| Oct 7, 2026 | $0.97 | $3.04 | $1.48 | -31.0% |
| Oct 3, 2026 | $1.40 | $4.40 | $2.15 | +45.1% |
| Oct 1, 2026 | $0.96 | $3.03 | $1.48 | -31.1% |
| Sep 28, 2026 | $1.40 | $4.40 | $2.15 | +45.1% |
| Sep 25, 2026 | $0.96 | $3.03 | $1.48 | -0.1% |
| Aug 30, 2026 | $0.97 | $3.04 | $1.48 | -23.3% |
| Aug 25, 2026 | $1.26 | $3.96 | $1.94 | +30.4% |
| Aug 15, 2026 | $0.97 | $3.04 | $1.48 | -31.0% |
| Aug 10, 2026 | $1.40 | $4.40 | $2.15 | +47.1% |
| Aug 6, 2026 | $0.95 | $2.99 | $1.46 | -1.4% |
| Jul 3, 2026 | $0.97 | $3.04 | $1.48 | -17.9% |
| Jul 2, 2026 | $0.98 | $4.30 | $1.81 | +20.0% |
| Jun 14, 2026 | $0.98 | $3.08 | $1.51 | -9.5% |
| Apr 23, 2026 | $1.05 | $3.50 | $1.66 | +10.8% |
| Apr 10, 2026 | $0.95 | $3.15 | $1.50 | -30.1% |
| Apr 9, 2026 | $1.40 | $4.40 | $2.15 | +38.5% |
| Apr 7, 2026 | $1.00 | $3.20 | $1.55 | first observation |
Where it is listed today
Current listed rates across the sources LLMPI compares. The cheapest blended row is highlighted; lower price never implies identical terms, speed, or quality.
| Source | Input | Output | Blended | Listing ID |
|---|---|---|---|---|
| AIHubMix Pricing evidence | $0.85 | $3.38 | $1.48 | glm-5.1 |
| OpenRouter Pricing evidence | $0.97 | $3.04 | $1.48 | z-ai/glm-5.1 |
| Nous Portal Provider catalog (not exact listing evidence) | $0.97 | $3.04 | $1.48 | z-ai/glm-5.1 |
| Novita Provider catalog (not exact listing evidence) | $1.38 | $4.40 | $2.14 | zai-org/glm-5.1 |
| Together Provider catalog (not exact listing evidence) | $1.40 | $4.40 | $2.15 | zai-org/GLM-5.1 |
| Direct API Pricing evidence | $1.40 | $4.40 | $2.15 | glm51 |
Evidence and scope
- Source
- OpenRouter public model listing
- Archive
- Wayback Machine snapshots of that listing (weekly-grade, from July 2023) plus LLMPI's own daily snapshots since June 2026
- Last observed
- Oct 9, 2026
- Data
- history.json (CC BY 4.0)
This is the listed standard text-token rate for one OpenRouter listing ID. It does not normalize caching, batch discounts, long-context tiers, providers behind the listing, or model quality. A price can also move because OpenRouter's default route changed provider.