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zai-org/glm-5.1

GLM-5.1 is Z.AI's latest flagship model, meticulously engineered for long-horizon autonomous tasks. Capable of working continuously on a single assignment for up to 8 hours, it autonomously manages the entire workflow—from initial planning and execution to iterative optimization and the delivery of production-grade results. While its general capabilities and coding proficiency are on par with Claude Opus 4.6, GLM-5.1 excels particularly in sustained execution, complex engineering optimization, a

🧠Reasoning🔧Tool calling
Try zai-org/glm-5.1CompareDocs

Specifications

Context window205K tokens
Max output—
API typechat
AddedMay 27, 2026
Model IDnovita/zai-org/glm-5.1
Data retentionYes
Used for trainingUnknown
Provider location🇺🇸 US
Privacy policyNovita AI Privacy Policy→

Benchmarks

Benchmarks haven't been published yet for this exact variant.

Some variants (region-specific deployments, highspeed tiers) share benchmarks with their base model — check the base model page or the Novita AI models overview.

Pricing

Input / 1M
$1.38
Output / 1M
$4.40
Cache write
—
Cache read
—
Estimated cost
100K input + 10K output$0.18
1M input + 100K output$1.82
10M input + 1M output$18.20

Requesty charges exactly what the upstream provider charges — no markup, no per-request fees. Prompt caching and smart routing can reduce effective cost by 30-80%.

Quickstart

Drop-in compatible with the OpenAI SDK. Change the base URL, swap in your Requesty API key, and set the model to novita/zai-org/glm-5.1.

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from openai import OpenAI

client = OpenAI(
    api_key="YOUR_REQUESTY_API_KEY",
    base_url="https://router.requesty.ai/v1",
)

response = client.chat.completions.create(
    model="novita/zai-org/glm-5.1",
    messages=[
        {"role": "user", "content": "Explain quantum computing in one paragraph."},
    ],
)

print(response.choices[0].message.content)

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Frequently asked questions

How much does zai-org/glm-5.1 cost?
zai-org/glm-5.1 is priced at $1.38 per million input tokens and $4.40 per million output tokens when accessed via Requesty. Requesty charges exactly what the upstream provider charges — we don't add markup.
What is the context window of zai-org/glm-5.1?
zai-org/glm-5.1 has a context window of 205K tokens. That's roughly 273 words of input you can fit in a single prompt.
What can zai-org/glm-5.1 do?
zai-org/glm-5.1 supports tool calling, extended reasoning. You can call it through any OpenAI-compatible client by pointing base_url to Requesty.
How do I use zai-org/glm-5.1 with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "novita/zai-org/glm-5.1". The Quickstart above shows Python, JavaScript and cURL snippets.

Access zai-org/glm-5.1 through Requesty

One API key, 400+ models, OpenAI-compatible. No markup on provider prices, automatic failover, and smart caching built-in.

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