gpt-5.4-lowGPT-5.4 with low reasoning effort. Light reasoning before answering — for day-to-day coding tasks that need a touch more thinking than base GPT-5.4 but should stay fast and cheap.
reasoning.effort = low — small step up from base GPT-5.4
Best for routine coding tasks; minimal reasoning token overhead
Reasoning tokens count as output_tokens at base GPT-5.4 rate
wire_api = "responses" + model = "gpt-5.4-low"
View complete API reference with all parameters and examples.
Enable real-time streaming responses with Server-Sent Events.
{
"model": "gpt-5.4-low",
"stream": true,
"messages": [...]
}Enable the model to use tools and call functions.
{
"model": "gpt-5.4-low",
"tools": [{
"type": "function",
"function": {
"name": "get_weather",
"description": "Get current weather for a location",
"parameters": {
"type": "object",
"properties": {
"location": {"type": "string", "description": "City name"}
},
"required": ["location"]
}
}
}],
"messages": [{"role": "user", "content": "What's the weather in Tokyo?"}]
}Get structured JSON responses from the model.
{
"model": "gpt-5.4-low",
"response_format": {"type": "json_object"},
"messages": [{"role": "user", "content": "Extract info as JSON: John is 30 years old"}]
}| Parameter | Type | Required | Description |
|---|---|---|---|
| model | string | Yes | Model identifier (e.g., gpt-5.4-low) |
| messages | array | Yes | Array of message objects with role and content |
| max_tokens | integer | No | Maximum tokens in the response |
| stream | boolean | No | Enable streaming responses (SSE) |
| temperature | number | No | Sampling temperature (0.0 - 2.0) |
| top_p | number | No | Nucleus sampling threshold (0.0 - 1.0) |
| tools | array | No | Function calling tools definition |
| response_format | object | No | Output format (e.g., json_object) |
View complete API reference with streaming, thinking, and more.
Billing: Cost = (input_tokens * input_price + output_tokens * output_price) / 1,000,000
GPT-5.4 (low reasoning) is a Large Language Model API provided by OpenAI. GPT-5.4 with low reasoning effort. Light reasoning before answering — for day-to-day coding tasks that need a touch more thinking than base GPT-5.4 but should stay fast and cheap. Through API Models platform, you can access this model via a unified API at prices significantly lower than official rates. Current pricing: Input: $0.552, Output: $4.412 per 1M tokens.
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GPT-5.4 (low reasoning) is available through API Models at: Input: $0.552, Output: $4.412 per 1M tokens. This is up to 95% cheaper than official pricing.
Sign up at API Models, get your API key, and call our unified API endpoint. We provide detailed API documentation with code examples in cURL, Python, and Node.js.
API Models offers the same GPT-5.4 (low reasoning) model at 60-95% lower cost through our aggregation platform. We provide a unified API interface so you do not need separate accounts for each provider - one API key to access all models.
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