GLM 5
Z.aiReleased Feb 11, 2026
GLM-5 is Z.ai’s flagship open-source foundation model engineered for complex systems design and long-horizon agent workflows. Built for expert developers, it delivers production-grade performance on large-scale programming tasks, rivaling leading...
- Context window
- 203K tokens
- Input
- text
- Output
- text
- Tokenizer
- Other
- Released
- Feb 11, 2026
- Reasoning
- optional
Pricing
Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.
| Per 1M tokens | Provider | + 3% fee | You pay |
|---|---|---|---|
| Input | $0.600 | $0.018 | $0.618 |
| Output | $1.92 | $0.058 | $1.98 |
| Cache read | $0.120 | $0.0036 | $0.124 |
Benchmarks
Design Arena
| Category | Elo | Win rate | Rank |
|---|---|---|---|
| androidnativeagents | 1244 | 62% | #6 |
| Full-stackagents | 1190 | 52.8% | #13 |
| godotgamedevagents | 1237 | 54.8% | #3 |
| Mobile appsagents | 1222 | 53.1% | #10 |
| 3Dmodels | 1307 | 56.8% | #15 |
| ASCII artmodels | 1192 | 47.7% | #26 |
| Codemodels | 1295 | 55.6% | #16 |
| Data vizmodels | 1269 | 52.9% | #22 |
| Game devmodels | 1299 | 57.4% | #15 |
| SVGmodels | 1225 | 54.4% | #19 |
| UI componentsmodels | 1287 | 54.1% | #21 |
| Websitesmodels | 1290 | 55.1% | #18 |
Head-to-head preference voting. How we filter and rank
Supported parameters
- frequency_penalty
- include_reasoning
- logit_bias
- logprobs
- max_tokens
- min_p
- presence_penalty
- reasoning
- repetition_penalty
- response_format
- seed
- stop
- structured_outputs
- temperature
- tool_choice
- tools
- top_k
- top_logprobs
- top_p
Call it
OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model z-ai/glm-5.
curl https://api.openkey.ai/v1/chat/completions \
-H "Authorization: Bearer $OPENKEY_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "z-ai/glm-5",
"messages": [{"role": "user", "content": "Hello"}]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.openkey.ai/v1",
api_key=os.environ["OPENKEY_API_KEY"],
)
completion = client.chat.completions.create(
model="z-ai/glm-5",
messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.openkey.ai/v1",
apiKey: process.env.OPENKEY_API_KEY,
});
const completion = await client.chat.completions.create({
model: "z-ai/glm-5",
messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);Questions
- How much does GLM 5 cost via API?
- Through OpenKey, GLM 5 costs $0.618 per 1M input tokens and $1.98 per 1M output tokens. That is the provider price ($0.600 / $1.92) plus a flat 3% fee — nothing else.
- What is GLM 5's context window?
- GLM 5 accepts up to 203K tokens of context.
- Is GLM 5 OpenAI-compatible?
- Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "z-ai/glm-5" using any OpenAI SDK — only the base URL and API key change.
- What inputs does GLM 5 support?
- GLM 5 accepts text input and produces text output.
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