OpenCat - AI Chat, Agent, MCP26.10.1

Bring AI into every part of your workflow: chat, writing, translation, and search.

. Multiple model options - local models, API Key, Cloud subscription, Apple Intelligence
. MCP - supports MCP and tool calls
. Web search - available on OpenCat Cloud and select providers
. System-wide translation - select text in any app for instant AI translation
. Content rendering - supports LaTeX formulas, Markdown, and code highlighting
. Cross-platform - natively built for Mac, iPhone, and iPad
. Data privacy - stored locally, synced across devices via iCloud

[Pro Features]
. AI Keyboard - invoke AI right in the text field of any app to polish or reply in one step
. OpenCat Cloud subscription provides access to all major models

[A Variety of Models]
. OpenCat Cloud - fast access to leading models
. Local models - one-tap download of open-source models for offline use, accelerated by Apple silicon
. BYOK - use your own API Key, including Coding Plan
. System models - supports Apple Foundation Models

[OpenCat Cloud - Ready to Use, No Setup]
. No sign-up, zero configuration, all major models supported
. 50+ models - ChatGPT, Claude, Gemini, Grok, DeepSeek, GLM, MiniMax, Kimi, Qwen, Doubao, and more, all in one place
. Online search supported

[System-Level AI Translation]
Set OpenCat as your default translation app to translate selected text directly in Safari, Mail, Notes, and any other app. Powered by large language models, translations are natural and fluent - far superior to traditional translation engines.

[Local Models, Offline Inference]
. One-tap download - popular open-source models like Llama, Qwen, and Gemma
. Apple silicon acceleration - built on Apple's official MLX framework, fully leveraging GPU performance for fast, energy-efficient inference
. Fully offline - works without internet, conversation data never leaves your device

[Use Your Own API Key]
. 25+ providers supported - OpenAI, Claude, Gemini, DeepSeek, Kimi, Qwen, Doubao, ERNIE, and more

[Contact Us]
Email: support@dreamoon.ai

Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy & Third-party AI Service Privacy Policy
https://opencat.app/privacy

Version History Removed the temperature parameter.
Upgraded the MLX local model engine: models load faster, streaming output is more stable, stopping generation responds instantly, and more new models are supported. 26.10.1 2d ago Improved translation display.
The Prompts list can now show archived items.
Improved UI and interactions. 26.9.5 Sep 30 Support for the latest models.
Added new Shortcuts actions that let you choose a provider.
Added OpenCode Go as a provider.
Fixed some UI issues. 26.9.4 Sep 24 Improved input text detection for the iOS keyboard. 26.9.3 Sep 18 Supports iOS 27 and macOS 27 26.9.2 Sep 15 Fixed an issue where entering Settings could freeze the app on iOS 17. 26.9.1 Sep 14 Text-to-speech improvements: added xAI and Gemini voice synthesis. Read Aloud now supports adjustable speed and voice.
Voice input improvements: added gpt-transcribe, Gemini, and grok-stt recognition models, with live word-by-word transcription as you speak.
Image generation improvements: support for the latest GPT, Gemini, and Grok models, with real-time generation progress.
Web search improvements: real-time search progress display and improved source display.
Support for the latest models, including DeepSeek vision models.
Model icons updated to official brand logos.
Fixed multiple UI issues. 26.8.4 Aug 28 Improved Translator experience.
Improved Keyboard experience.
Groq now uses the Responses API.
Response generation continues when switching conversations.
Fixed a rendering issue with Markdown tables. 26.8.3 Aug 25 Support for the latest DeepSeek and Grok models.
Fixed UI issues 26.8.2 Aug 18 DeepSeek API now supports web search.
Improved translations for Simplified Chinese, Traditional Chinese, Japanese, Korean, German, French, Spanish, Portuguese, Dutch, and Vietnamese.
Improved macOS stability by fixing crashes that could be caused by certain screens. 26.8.0 Aug 7 Support for uploading PDF and text files.
Grok models now support Web and X search.
Tools now persist their last selected state.
UI and performance improvements. 26.7.4 Jul 30 Support for the latest models 26.7.2 Jul 11 Bug fixes and performance improvements. 26.7.1 Jul 9 Added support for Claude Sonnet 5.
Fixed an issue where Shortcuts stopped working. 26.7.0 Jul 1 Fixed can't browse models when using Responses API. 2.94.2 Jun 30 Improved accessibility experience 2.94.1 Jun 24 More models in Cloud support web search
Markdown performance optimization
UI performance and experience improvements 2.94.0 Jun 16 Support for Claude Fable 5 model 2.93.2 Jun 11 Support for the latest models.
Support for Claude Adaptive thinking. 2.93.1 Jun 5 Support for the latest models. 2.92.8 Jun 1 Support for Gemini 3.5 2.92.7 May 21 Fix DeepSeek provider issues 2.92.6 May 13 Fix bugs and performance improvements. 2.92.5 May 1 Support for GPT 5.5.
DeepSeek now supports browsing models.
Azure now uses the Responses API. 2.92.4 Apr 27 Support for DeepSeek V4.
OpenRouter now supports WebSearch.
Fixed model support issues for Nvidia. 2.92.3 Apr 25