GLM-5
GLM-5 is Z.AI's flagship open-source foundation model, engineered for complex systems design and long-horizon agent workflows aimed at expert developers.
input · usd / 1m tok
$1.00
output · usd / 1m tok
$3.20
context window
200ktokens
modalities · in → out
takes text in, gives text out
pricing
base api ratesusd per 1m tokens
- input
- $1.00
- output
- $3.20
- cache read
- $0.20
providers
Z.AI hosts GLM-5. Impossibl routes your request intelligently and handles failover automatically when a provider is down.
- Z.AI
specifications
takes text in, gives text outzai/glm-5
- creatorZ.AI
- model typeText generation
- context window200,000 tokens
- maximum outputnot published
- input
takes text in, gives text out
- outputtext
- tool callingnot verified
- releasedfeb 11, 2026
- endpoint
/v1/chat/completions
unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.
try it · your prompt, this model, live
# responses API
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["IMPOSSIBL_API_KEY"],
base_url="https://api.impossibl.com/v1",
)
resp = client.responses.create(
model="zai/glm-5",
input="",
)
print(resp.output_text)
edit the prompt, then run
benchmarks
intelligence index
27.9#55 of 113 models on the gateway
- omniscience0.3#40 of 90
- gpqa82.0%#54 of 82
- humanity’s last exam29.3%#48 of 93
- Tau298.2%
- GPQA82.0%
- AA-LCR75.7%
- IFBench72.3%
- Terminal-Bench Hard43.2%
- Humanity’s Last Exam29.3%
- APEX-Agents14.5%
- CritPt2.0%
- Intelligence Index27.91
- Omniscience Index0.27
- intelligence index (API)27.9
each configuration is listed separately; these evaluations describe the tested model configuration, and performance and costs can differ on impossibl. unmeasured scores are omitted and api values keep their source units. last checked 2026-10-21.
compare GLM-5 with other models
frontier labs and open weights, best-ranked firstusd / 1m tok · in / out
- anthropic/claude-opus-5-5$4.00 / $20.00compare →
- moonshotai/kimi-k3.1-pro$2.00 / $10.00compare →
- openai/gpt-6-astra$10.00 / $50.00compare →
- meta/muse-wonder$4.00 / $20.00compare →
frequently asked questions
What is GLM-5?
GLM-5 is Z.AI's flagship open-source foundation model, engineered for complex systems design and long-horizon agent workflows aimed at expert developers. It shifts the family's focus from coding to engineering, targeting backend architecture, complex algorithms, and stubborn debugging on large-scale programming tasks.
How much does GLM-5 cost?
GLM-5 costs $1.00 per million input tokens and $3.20 per million output tokens through the Impossibl API. Cache reads cost $0.20 per million tokens. All rates are in USD.
What is the context length of GLM-5?
GLM-5 has a 200,000-token context window through the Impossibl API.
What inputs and outputs does GLM-5 support?
GLM-5 accepts text as input. GLM-5 returns text.
How do I use GLM-5 through an API?
GLM-5 is available through the Impossibl API. Use zai/glm-5 as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.
When was GLM-5 released?
Z.AI released GLM-5 on February 11, 2026.
this page describes GLM-5 as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes. model descriptions and release dates, where available, use the creator sources linked under the answers above.
view the source catalog ↗model as markdown ↗report a correction →