Activefastllm Proprietary

GPT-4.1 Mini

by OpenAI· Released April 2025· Cutoff June 2024

GPT-4.1 Mini is a cost-efficient, low-latency model in the GPT-4.1 family, designed for fast and affordable inference while maintaining strong reasoning capabilities. It offers a 1M token context window and supports multimodal inputs (text and images), making it suitable for high-volume, real-time applications.

Official Site API Docs

Input cost

$0.40 per 1M tokens

Output cost

$1.60 per 1M tokens

Context window

1M tokens

Max output

32768 tokens

Modalities

textimage

License

proprietary

Capabilities

Function CallingVisionCode GenerationStreamingJSON ModeStructured OutputsLong ContextMultilingual

Best For

High-volume, real-time applications requiring low latency and cost efficiency with strong reasoning and long context support.

Strengths

Lowest cost in GPT-4.1 family
Fast inference speed
1M token context window
Strong reasoning for its size
Multimodal (text + image input)

Limitations

Lower overall intelligence compared to GPT-4.1 and GPT-4.1 Nano
No audio or video input support
May struggle with highly complex tasks requiring deep reasoning
Limited to text and image modalities

Use Cases

Customer support chatbots

Real-time content moderation

Data extraction and classification

Code generation and debugging

Summarization of long documents

Multilingual translation

Image captioning and analysis

Improvements Over Previous Model

Introduced as a new smaller model in GPT-4.1 family, offering lower cost and faster speed than GPT-4.1
1M token context window, matching GPT-4.1 and GPT-4.1 Nano
Pricing significantly lower than GPT-4.1 ($0.40 vs $2.00 input per 1M tokens)
Supports vision (image input) unlike GPT-4.1 Nano
Optimized for low-latency, high-throughput applications

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