GLM 5.1

z-ai/glm-5.1
Flagship
by Z.ai · text in · text out · 200K ctx · 2026-04-07

Z.ai's strongest coding-and-agent model in the GLM-5 line; supports streaming tool calls and deep th…

Endpoints:/v1/chat/completions
INPUT$1.40/ 1M tokens
OUTPUT$4.40/ 1M tokens
p50 TTFT7.35 s7d
p95 TTFT30.71 s7d
TRAFFIC9.1Mtokens / 7d
▶ Try in playground</> Use via API
Code samples
from openai import OpenAI

client = OpenAI(
    base_url="https://orcarouter.ai/v1",
    api_key="$ORCAROUTER_API_KEY",
)

response = client.chat.completions.create(
    model="z-ai/glm-5.1",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)
Pricing
Input / 1M tokens$1.40
Output / 1M tokens$4.40
Cache read / 1M$0.260
CurrencyUSD
Performancelast 7 days
TTFT p50
7.35 s
Output speed
68.0 tok/s
TTFT p95
30.71 s
Error rate
0%
Public benchmarksLast evaluated 2026-04-07
AA Coding
43.4
AA Intelligence
51.4
GPQA Diamond
86.8
Humanity's Last Exam
28.0
IFBench
76.3
Long-Context Recall
62.3
SciCode
43.8
TerminalBench Hard
43.2
τ²-Bench
97.7
Source: artificialanalysis.ai
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FAQ
How much does Z.ai: GLM 5.1 cost on OrcaRouter?
Z.ai: GLM 5.1 is priced at $1.40 per 1M input tokens and $4.40 per 1M output tokens via OrcaRouter. Pricing is pulled live from the routing layer.
What is Z.ai: GLM 5.1's context window?
Z.ai: GLM 5.1 supports a context window of 200K tokens. Use long-context features (RAG, summarisation) up to that limit.
How do I call Z.ai: GLM 5.1 via the OpenAI SDK?
Set OpenAI base_url to https://orcarouter.ai/v1, supply your OrcaRouter API key, and pass model="z-ai/glm-5.1" in the chat.completions.create call.
Does OrcaRouter rate-limit Z.ai: GLM 5.1?
Per-model rate limits follow your OrcaRouter plan. Free tiers ship with conservative caps; paid tiers lift them. Check /pricing for current quotas.
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