Z.ai · Model identity
GLM 5.1
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...
1pricing route
What published route metadata supports
CachingHugging FaceReasoningStructured outputTool use
Input modalities
Text
Supported API parameters
frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p
Only source-backed fields are filled
Release dateNot independently verified
Knowledge cutoffNot independently verified
Open weightsNot independently verified
OpenRouter catalog date2026-04-07
LLMPrice does not infer a release date, knowledge cutoff, or open-weight status from a model name, Hugging Face link, or pricing route.
Could this workload cost less?Compare GLM 5.1 with cheaper models using the same workload.
Find cheaper alternatives →| Endpoint / route | Model ID | Input | Cached | Output | Context | Source |
|---|---|---|---|---|---|---|
| OpenRouterStandard | z-ai/glm-5.1 | $0.966 | $0.1794 | $3.04 | 205K | OpenRouter API ↗ |
Hugging Face references
Presence of a Hugging Face ID is not treated as proof that model weights are open.
4 verified price changes since Aug 26, 2026
0 route availability changes recorded. No earlier prices are inferred.
Input / 1M$0.966Aug 26, 2026 → Oct 7, 2026
Output / 1M$3.04Aug 26, 2026 → Oct 7, 2026
- Oct 7, 2026OpenRouter · Standard
Input $1.4 → $0.966 · Cached input $0.26 → $0.1794 · Output $4.4 → $3.04
- Oct 3, 2026OpenRouter · Standard
Input $0.9646 → $1.4 · Cached input $0.1791 → $0.26 · Output $3.03 → $4.4
- Sep 25, 2026OpenRouter · Standard
Input $0.966 → $0.9646 · Cached input $0.1794 → $0.1791 · Output $3.04 → $3.03
- Aug 30, 2026OpenRouter · Standard
Input $1.26 → $0.966 · Cached input $0.234 → $0.1794 · Output $3.96 → $3.04