GPT-4.1 mini

Text Generation • OpenAI

openai/gpt-4.1-mini

• Third-party
• Zero data retention

Fast, affordable version of GPT-4.1 with a million-token context window.

Usage

const response = await env.AI.run(
  'openai/gpt-4.1-mini',
  { messages: [{ content: 'What are the three laws of thermodynamics?', role: 'user' }] },
)
console.log(response)

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "openai/gpt-4.1-mini",
  "messages": [
    {
      "content": "What are the three laws of thermodynamics?",
      "role": "user"
    }
  ]
}'

The three laws of thermodynamics are fundamental principles that describe how energy behaves in physical systems:

1. **First Law of Thermodynamics (Law of Energy Conservation):**  
   Energy cannot be created or destroyed; it can only be transferred or transformed from one form to another. In other words, the total energy of an isolated system remains constant. Mathematically, it is often expressed as:  
   \[
   \Delta U = Q - W
   \]  
   where \(\Delta U\) is the change in internal energy of the system, \(Q\) is the heat added to the system, and \(W\) is the work done by the system.

2. **Second Law of Thermodynamics:**  
   The total entropy of an isolated system can never decrease over time; it either increases or remains constant in ideal cases. Entropy is a measure of disorder or randomness. This law implies that natural processes tend to move toward a state of greater disorder, and it explains the direction of heat transfer (from hot to cold).  

3. **Third Law of Thermodynamics:**  
   As the temperature of a system approaches absolute zero (0 Kelvin), the entropy of a perfect crystal approaches a constant minimum, which can be taken as zero. This means it is impossible to reach absolute zero temperature through any finite series of processes.

If you need, I can also explain the Zeroth Law, which is foundational and often included when discussing thermodynamics.

{
  "choices": [
    {
      "finish_reason": "stop",
      "index": 0,
      "logprobs": null,
      "message": {
        "annotations": [],
        "content": "The three laws of thermodynamics are fundamental principles that describe how energy behaves in physical systems:\n\n1. **First Law of Thermodynamics (Law of Energy Conservation):**  \n   Energy cannot be created or destroyed; it can only be transferred or transformed from one form to another. In other words, the total energy of an isolated system remains constant. Mathematically, it is often expressed as:  \n   \\[\n   \\Delta U = Q - W\n   \\]  \n   where \\(\\Delta U\\) is the change in internal energy of the system, \\(Q\\) is the heat added to the system, and \\(W\\) is the work done by the system.\n\n2. **Second Law of Thermodynamics:**  \n   The total entropy of an isolated system can never decrease over time; it either increases or remains constant in ideal cases. Entropy is a measure of disorder or randomness. This law implies that natural processes tend to move toward a state of greater disorder, and it explains the direction of heat transfer (from hot to cold).  \n\n3. **Third Law of Thermodynamics:**  \n   As the temperature of a system approaches absolute zero (0 Kelvin), the entropy of a perfect crystal approaches a constant minimum, which can be taken as zero. This means it is impossible to reach absolute zero temperature through any finite series of processes.\n\nIf you need, I can also explain the Zeroth Law, which is foundational and often included when discussing thermodynamics.",
        "refusal": null,
        "role": "assistant"
      }
    }
  ],
  "created": 1776470803,
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "id": "chatcmpl-DVnUpsMw42Gxv3Iebj1PqAKL5ggSz",
  "model": "gpt-4.1-mini-2025-04-14",
  "object": "chat.completion",
  "service_tier": "default",
  "system_fingerprint": "fp_283a574ac4",
  "usage": {
    "completion_tokens": 297,
    "completion_tokens_details": {
      "accepted_prediction_tokens": 0,
      "audio_tokens": 0,
      "reasoning_tokens": 0,
      "rejected_prediction_tokens": 0
    },
    "prompt_tokens": 16,
    "prompt_tokens_details": {
      "audio_tokens": 0,
      "cached_tokens": 0
    },
    "total_tokens": 313
  }
}

Examples

<details>

<summary>With System Message — Using a system message to set context</summary>

const response = await env.AI.run(
  'openai/gpt-4.1-mini',
  {
    messages: [
      { content: 'You are a helpful coding assistant specializing in Python.', role: 'system' },
      { content: 'How do I read a JSON file in Python?', role: 'user' },
    ],
  },
)
console.log(response)

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "openai/gpt-4.1-mini",
  "messages": [
    {
      "content": "You are a helpful coding assistant specializing in Python.",
      "role": "system"
    },
    {
      "content": "How do I read a JSON file in Python?",
      "role": "user"
    }
  ]
}'

``` To read a JSON file in Python, you can use the built-injson` module. Here's a simple example:

```python import json