Z AI

Models/GLM 5.1

Name: Models/GLM 5.1
Brand: Z AI
Price: 0.95 USD
Availability: InStock

Models/GLM 5.1 is a reasoning model by Z AI with function calling, structured output — designed for complex, multi-step problem solving where accuracy matters more than speed. It supports a 203K token context window with up to 33K tokens of output. Priced at $0.95 per million input tokens and $3.25 per million output tokens. Access Models/GLM 5.1 through Inworld Router with OpenAI SDK compatibility, built-in failover, and intelligent routing across providers.

→Function CallingReasoningResponse SchemareasoningCapabilityresponseFormatCapability

Use This Model

Step 1 — Create Router

curl --location 'https://api.inworld.ai/router/v1/routers' \
--header 'Authorization: Basic <your-api-key>' \
--header 'Content-Type: application/json' \
--data '{
  "name": "compare-frontier-models",
  "defaultRoute": {
    "route_id": "default",
    "variants": [
      {
        "variant": {
          "variant_id": "inworld/models/GLM-5.1-a",
          "model_id": "inworld/models/GLM-5.1"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "fireworks/accounts/fireworks/models/glm-5p1-b",
          "model_id": "fireworks/accounts/fireworks/models/glm-5p1"
        },
        "weight": 33
      },
      {
        "variant": {
          "variant_id": "deepinfra/zai-org/GLM-4.7-c",
          "model_id": "deepinfra/zai-org/GLM-4.7"
        },
        "weight": 34
      }
    ]
  }
}'

import requests

response = requests.post(
    "https://api.inworld.ai/router/v1/routers",
    headers={
        "Authorization": "Basic <your-api-key>",
        "Content-Type": "application/json",
    },
    json={
        "name": "compare-frontier-models",
        "defaultRoute": {
            "route_id": "default",
            "variants": [
                {
                    "variant": {
                        "variant_id": "inworld/models/GLM-5.1-a",
                        "model_id": "inworld/models/GLM-5.1"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "fireworks/accounts/fireworks/models/glm-5p1-b",
                        "model_id": "fireworks/accounts/fireworks/models/glm-5p1"
                    },
                    "weight": 33
                },
                {
                    "variant": {
                        "variant_id": "deepinfra/zai-org/GLM-4.7-c",
                        "model_id": "deepinfra/zai-org/GLM-4.7"
                    },
                    "weight": 34
                }
            ]
        }
    },
)
print(response.json())

const response = await fetch(
  "https://api.inworld.ai/router/v1/routers",
  {
    method: "POST",
    headers: {
      Authorization: "Basic <your-api-key>",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      name: "compare-frontier-models",
      defaultRoute: {
        route_id: "default",
        variants: [
          {
            variant: {
              variant_id: "inworld/models/GLM-5.1-a",
              model_id: "inworld/models/GLM-5.1",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "fireworks/accounts/fireworks/models/glm-5p1-b",
              model_id: "fireworks/accounts/fireworks/models/glm-5p1",
            },
            weight: 33,
          },
          {
            variant: {
              variant_id: "deepinfra/zai-org/GLM-4.7-c",
              model_id: "deepinfra/zai-org/GLM-4.7",
            },
            weight: 34,
          },
        ],
      },
    }),
  }
);
const data = await response.json();
console.log(data);

Step 2 — Chat Completion

curl --location 'https://api.inworld.ai/v1/chat/completions' \
--header 'Authorization: Basic <your-api-key>' \
--header 'Content-Type: application/json' \
--data '{
  "model": "inworld/compare-frontier-models",
  "messages": [{"role": "user", "content": "Hello!"}]
}'

Models/GLM 5.1 pricing and providers

Access Models/GLM 5.1 through Inworld via Inworld Router or Realtime API. By using the AI provider(s) below you acknowledge you reviewed and agree to their terms listed in the Legal section under the AI provider's name.

					Capabilities	Input modalities	Output modalities
Inworld	202.8K	32.8K	$0.95	$3.25	+2

Other Z AI models available through Inworld

Compare Models/GLM 5.1 with other Z AI models available through Inworld Router or Realtime API.

					Capabilities
Accounts/fireworks/models/glm 5p1	202.8K	202.8K	$1.40	$4.40
Zai Org/GLM 4.7	202.8K	—	$0.40	$1.75	+2
Zai Org/GLM 4.7 Flash	202.8K	—	$0.06	$0.40	+2
Zai Org/GLM 5	202.8K	—	$0.60	$2.08	+2
Zai Org/GLM 5.1	202.8K	32.8K	$1.05	$3.50	+2
Zai Org/GLM 5.2	1M	131.1K	$1.40	$4.40	+2

Start building with Models/GLM 5.1

Access Models/GLM 5.1 and every other model through Inworld Router or Realtime API. Create your free account and start routing in minutes.

Get Started Free Contact Sales