GPT 5.4 Mini
gpt-5.4-mini is the small, fast, cost-efficient member of OpenAI's GPT-5.4 family, built for high-volume production at low latency.
Use cases
gpt-5.4-mini real-time assistants · gpt-5.4-mini high-volume production
Input
Text, image
Output
Text
Billing
Per token
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Sign up to get $0.5 in free credits — about 20 free images
Pricing details
Transparent usage-based pricing with no hidden fees.
Detailed Pricing
Usage-based pricing breakdown
| Spec | Price | Official | Savings |
|---|---|---|---|
| Input/1M tokens | 0.6 Credits≈$0.6 | 0.75 Credits | -20% |
| Output/1M tokens | 3.6 Credits≈$3.6 | 4.5 Credits | -20% |
| Cache Read/1M tokens | 0.06 Credits≈$0.06 | 0.075 Credits | -20% |
Billing Rules
- Output price varies by model, resolution, quality, duration, or token usage.
- Uploaded reference files may be charged separately when supported.
- Add-on capabilities such as web search or image search may be billed per request.
- Token-based models are billed by input and output tokens.
- If the primary route is unavailable, Velokey may automatically switch to a stable fallback route when possible.
- Usage is pay-as-you-go with transparent credit deduction.
* Final cost depends on the generated result.
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Affordable gpt-5.4-mini API
Access OpenAI's small, fast, cost-efficient GPT-5.4 model on Velokey — low latency, high throughput, multimodal text and vision, long context, and strong tool use, with a unified endpoint and below-list pricing for high-volume production.
Meet gpt-5.4-mini and its API access
gpt-5.4-mini is the small, fast, and cost-efficient member of OpenAI's GPT-5.4 family. It is tuned for low latency and high throughput, making it far cheaper to run than gpt-5.4 or gpt-5.5 while keeping solid quality on everyday tasks. It is multimodal, accepting text and image input, and supports a long context window, function calling, structured outputs, and streaming.\n\ngpt-5.4-mini is a strong default for high-volume production, real-time assistants, classification and extraction, and any cost-sensitive workload where you want good quality at a low price. Velokey provides an affordable, easy-to-integrate gpt-5.4-mini API: a unified chat endpoint, a clear request flow, and below-list pricing for production systems, agent pipelines, and automation tools.
Fast, low-latency inference
Tuned for speed and high throughput, gpt-5.4-mini returns responses quickly, making it a strong fit for real-time assistants, chat, and interactive experiences where every millisecond counts.
View Documentation →
Cost-efficient at scale
At 0.75 credits per 1M input tokens and 4.5 credits per 1M output tokens, gpt-5.4-mini is much cheaper than gpt-5.4 and gpt-5.5, ideal for high-volume production and cost-sensitive workloads.
View Documentation →
Multimodal vision and long context
Accepts text and image input with a long context window, so it stays coherent across long documents and conversations while handling visual understanding tasks alongside text.
View Documentation →
Strong tool use and function calling
Reliable at tool selection and argument specification, gpt-5.4-mini supports function calling and structured outputs, making it a dependable engine for agents and automation at a low price.
View Documentation →
How to deploy the gpt-5.4-mini API on Velokey
Get started with just a few steps.
Sign up and get an API Key
Sign in to the Velokey console to generate an API Key that authenticates every request sent to gpt-5.4-mini.
Configure request parameters
Set model to gpt-5-4-mini and submit messages. Tune temperature, max_tokens, and streaming to balance quality, latency, and cost for high-volume traffic.
Integrate and start calling
Send requests to Velokey's unified /v1/chat/completions endpoint to power assistants, agents, and automation, with usage managed in one console.
Real-world use cases for gpt-5.4-mini
From real-time assistants to high-volume data work, covering many cost-sensitive scenarios.
Real-time assistants & chat
Powers low-latency chat, support bots, and interactive assistants where fast responses keep the experience smooth.
High-volume production
Handles large request volumes at low cost, ideal for pipelines that process many inputs continuously.
Classification & extraction
Reliable for labeling, routing, and pulling structured fields from text and documents at scale.
Tool-using agents
Supports function calling and structured outputs, a cost-efficient engine for multi-step agents and automation.
Cost-sensitive workloads
Delivers good quality at a low price, a strong default when budget matters more than peak reasoning depth.
Vision understanding
Reads images alongside text for captioning, moderation, and multimodal analysis in production.
Why choose Velokey for gpt-5.4-mini
Discount on list price
Call gpt-5.4-mini at a lower price on Velokey — pay-as-you-go with no forced subscription, reducing upfront cost.
Unified API interface
One API Key accesses gpt-5.4-mini and other models — no juggling multiple accounts and keys, simplifying integration.
Complete docs and migration guidance
Endpoint references, parameter details, and migration examples help you quickly move high-volume traffic to gpt-5.4-mini.
Stable and highly available
Automatic failover and stable fallback routes maintain availability when the primary route is down, keeping production reliable.
API Reference
Complete API call examples and parameter descriptions
Endpoint
https://api.velokey.ai/v1/chat/completionsAuthentication
Bearer YOUR_API_KEYRequest Example
curl https://api.velokey.ai/v1/chat/completions \
-X POST \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.4-mini",
"messages": [{"role": "user", "content": "Hello!"}],
"temperature": 0.7
}'Response Example
{
"id": "req_abc123",
"model": "gpt-5.4-mini",
"created": 1234567890,
"data": { ... }
}gpt-5.4-mini API FAQ
What is the gpt-5.4-mini API?
gpt-5.4-mini is available through Velokey as a chat model. Set model to gpt-5-4-mini and use the family-specific endpoint.
Which parameters does gpt-5.4-mini use?
The playground shows the main fields for gpt-5.4-mini, including the model id and the most important generation parameters.
How is gpt-5.4-mini billed?
Pricing is shown on this page when available, and credits are managed from one Velokey account.
Who should use gpt-5.4-mini?
It fits teams that want fast, cost-efficient inference for high-volume, latency-sensitive workloads through a unified API.
Start building with GPT 5.4 Mini today
Use one API key to access low-cost, stable AI models through Velokey.