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Z.ai: GLM 5.1 API Pricing
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...
How much does Z.ai: GLM 5.1 cost for a real workload?
At 10M input + 2M output tokens per month, Z.ai: GLM 5.1 costs about $22.8 ($14 input + $8.8 output). Try your own volumes in the cost calculator.
What are cheaper alternatives to Z.ai: GLM 5.1?
- OpenAI: GPT-5.1 (batch) — $0.625 in / $5 out per 1M
- OpenAI: GPT-5 (batch) — $0.625 in / $5 out per 1M
- Mistral: Mistral Large 4 — $1.36 in / $4.18 out per 1M
- Meta: Muse Spark Open — $1.25 in / $4.25 out per 1M
- Meta: Muse Spark 1.3 — $1.25 in / $4.25 out per 1M
- Meta: Muse Spark 1.2 — $1.25 in / $4.25 out per 1M
Where to run Z.ai: GLM 5.1
AI/ML API: one API key for 400+ models, including most models tracked here · Novita AI: pay-as-you-go APIs for open models (DeepSeek, Qwen, Llama and more) plus GPU cloud. Prices there follow each platform's own catalog and can differ from the list prices tracked here.
Run it on AI/ML API →Run it on Novita AI →
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Compare Z.ai: GLM 5.1 with other models
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Frequently asked questions
How much does Z.ai: GLM 5.1 cost?
Z.ai: GLM 5.1 costs $1.4 per 1M input tokens and $4.4 per 1M output tokens (list price, snapshot October 22, 2026). At 10M input + 2M output tokens per month that is about $22.8.
What is the context window of Z.ai: GLM 5.1?
Z.ai: GLM 5.1 has a context window of 204,800 tokens and can return up to 131,072 output tokens per response.
What are cheaper alternatives to Z.ai: GLM 5.1?
Cheaper models include OpenAI: GPT-5.1 (batch) ($0.625 in / $5 out), OpenAI: GPT-5 (batch) ($0.625 in / $5 out), Mistral: Mistral Large 4 ($1.36 in / $4.18 out). See the full list on this page.
Is Z.ai: GLM 5.1 free to use?
No. Z.ai: GLM 5.1 is a paid model at $1.4 input / $4.4 output per 1M tokens. 21 free models are listed on the free models page.
Provider: z-ai · Model ID: z-ai/glm-5.1 · Modality: text->text · Price snapshot October 22, 2026, refreshed daily. How we collect prices