# What is AI Chat?

The AI Chat tool allows you to interact with advanced language models to ask questions, draft content, analyze data, or brainstorm ideas. You can type requests, attach supporting files, and receive contextual responses in real time.

<figure><img src="https://3503370835-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOHDPAn3RzU7mRQrMH1UK%2Fuploads%2F8DsrQUYrqy0M8Y64qeWK%2FFrame%202147233168.png?alt=media&#x26;token=f0395e4a-959d-42a8-bdcc-f72e84b07e08" alt=""><figcaption></figcaption></figure>

### Input Types

**Text-to-Text**

* Enter queries in plain language.
* Supports both short prompts and multi-paragraph requests.

**Attachments**

* Supported file types: .jpg, .jpeg, .png, .gif, .webp, .pdf, .txt, .csv, .json, .md, .html, .docx, .pptx, .xlsx, .epub
* Supported image extensions&#x20;
* File size: up to 20 MB per file.

Chatly supports a wide range of models from leading providers. Each model has different strengths in speed, reasoning, creativity, and efficiency. This section outlines the available models and explains their intended use.

<figure><img src="https://3503370835-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOHDPAn3RzU7mRQrMH1UK%2Fuploads%2Fyb9y9GymyFg9weEIoAEa%2FFrame%202147233169.png?alt=media&#x26;token=ac6511ec-a865-4819-aa84-537b5c2a3420" alt=""><figcaption></figcaption></figure>

### OpenAI Models

* [GPT-5 Mini](https://chatlyai.app/models/gpt-5-mini): A compact version of GPT-5 designed for everyday tasks where **speed and cost efficiency** matter most. Ideal for quick responses, lightweight reasoning, and high-throughput applications such as chat assistants, automation, and simple coding tasks
* [GPT-5](https://chatlyai.app/models/gpt-5): OpenAI’s unified general-purpose model that balances **reasoning ability, conversational quality, and versatility**. Suitable for long-form responses, knowledge work, coding, and complex problem solving across many domains.
* [GPT-5.1](https://chatlyai.app/models/gpt-5-1): An improved iteration of GPT-5 with **faster responses and more adaptive reasoning**. Provides stronger conversational flow, better multi-step problem solving, and improved reliability while maintaining high efficiency.
* [GPT-4o-mini](https://chatlyai.app/models/o4-mini): A **lightweight, fast, and cost-efficient** model optimized for short queries and straightforward outputs. Best suited for simple automation, small chat tasks, classification, and rapid responses at scale.
* [GPT-4o](https://chatlyai.app/models/gpt-4o): A **multimodal model** capable of processing text, images, and other input types. Delivers strong reasoning, natural conversation, and high-quality content generation across multiple formats.
* [GPT-5.2](https://chatlyai.app/models/gpt-5-2): A next-generation flagship model with **enhanced reasoning, larger context handling, improved coding capabilities, and reliable tool usage**. Designed for professional workloads, complex analysis, and advanced AI applications.
* [GPT-5.2 Pro](https://chatlyai.app/models/gpt-5-2-pro): The most powerful variant of GPT-5.2, built for **maximum accuracy and reliability**. Excels in scientific reasoning, mathematics, complex coding, and high-stakes analytical tasks.
* [GPT-5.4](https://chatlyai.app/chat?utm_model=vgpt-g5-4)**:** An advanced evolution of the GPT-5 series focused on **stronger reasoning depth, improved long-context understanding, and more stable tool interactions**. Optimized for research, technical workflows, and large-scale knowledge processing.
* [GPT-5.4 Pro](https://chatlyai.app/chat?utm_model=vgpt-g5-4p): The highest-capability model in the GPT-5 family, offering **state-of-the-art reasoning, maximum reliability, and the strongest performance on complex scientific, mathematical, and multi-step problem solving tasks**. Designed for enterprise, research, and mission-critical AI systems.
* [**GPT-5.4 Mini**](https://chatlyai.app/chat?utm_model=vgpt-g5-4m)**:** A lightweight and efficient variant of the GPT-5.4 series, designed for fast responses and cost-effective performance while maintaining solid reasoning and contextual understanding. Optimized for everyday tasks, chat applications, and scalable workflows where speed and efficiency are key.
* [GPT-5.4 Nano](https://chatlyai.app/chat?utm_model=vgpt-g5-4n)**:** An ultra-fast and highly efficient model in the GPT-5.4 family, built for low-latency use cases and high-throughput environments. Prioritizes speed and minimal resource usage, making it ideal for real-time applications, simple queries, and edge deployments.

### Anthropic Models

* [Claude 4.6 Sonnet](https://chatlyai.app/models/claude-sonnet-4-6): Powerful model for coding, reasoning, and complex problem solving. It delivers state-of-the-art performance across real-world tasks and domain knowledge in finance, law, medicine, and STEM.
* [Claude 4 Sonnet](https://chatlyai.app/models/claude-sonnet-4): Anthropic’s advanced model. Strong performance in reasoning, analysis, and programming tasks.
* [Claude 4.5 Haiku](https://chatlyai.app/models/claude-haiku-4-5): Anthropic’s fastest, cost-efficient model.&#x20;
* [Claude 4.6 Opus](https://chatlyai.app/models/claude-opus-4-6): Anthropic's most capable AI model that excels at coding, agent tasks, and everyday work like research and document handling.
* [Claude 4.5 Sonnet](https://chatlyai.app/chat?utm_model=vgpt-cl4-5): Anthropic's most capable AI model that excels at coding, agent tasks, and everyday work like research and document handling.

### Google Models

* [Gemini 2.5 Pro](https://chatlyai.app/models/gemini-2-5-pro): Supports advanced reasoning, detailed answers, and multimodal input.
* [Gemini 3 Pro](https://chatlyai.app/models/gemini-3-pro): Google's most advanced AI model, optimized for high-level reasoning, complex tasks, and expert-level knowledge across various domains.
* [Gemini 3.1 Pro](https://chatlyai.app/chat?utm_model=vgpt-g3-1p): An upgraded iteration of Gemini 3 Pro with stronger deep reasoning across text, images and code. It refines 'Deep Think' for more accurate problem-solving, enhanced coding abilities, and more reliable research-backed answers.
* [Gemini 3.0 Flash](https://chatlyai.app/models/gemini-3-flash): Google’s ultra-fast multimodal AI model, optimized for low-latency responses, real-time interactions, and high-throughput tasks at scale.
* [Gemini 3.1 Flash Lite](https://chatlyai.app/chat?utm_model=vgpt-g3-1fl): A lightweight, ultra-fast model optimized for low-cost, high-throughput tasks and simple interactions. Ideal for quick responses and large-scale applications. ⚡

### xAI Models

* [Grok 4](https://chatlyai.app/models/grok-4): The latest Grok release. Optimized for advanced reasoning and problem-solving.
* [Grok 4 Fast](https://chatlyai.app/models/grok-4-fast): Delivers quick, reliable answers to help you stay informed, research faster, and solve problems efficiently across a wide range of topics.
* [Grok 4.1 Fast (Reasoning)](https://chatlyai.app/models/grok-4-1-fast): X.AI's most advanced artificial intelligence model to date, designed for high-level reasoning, real-time information access, and complex problem-solving.

### MoonShot AI Model

* [Kimi K2 (Instruct)](https://chatlyai.app/models/kimi-k2): A 1-trillion-parameter, Mixture-of-Experts model from Moonshot AI (32B active), tuned for fast, instruction-following conversation, tool use, and agentic workflows.