
OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
#1OpenAI Platform records 234,678,639 monthly visits with -9.6% month-over-month growth and Paid pricing. OpenCat records 5,083 monthly visits with -8.2% growth and Freemium, Free Trial pricing.
A native, fast AI chat client for Mac, iPad, and iPhone
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | openai.com | opencat.app |
| Pricing Model | Paid | Freemium, Free Trial |
| Monthly Visits | 234.68M (234,678,639) | 5.08K (5,083) |
| MoM Traffic Delta | -24.78M (-9.6%) |
| -455 (-8.2%) |
| Primary Market & Share | 🇺🇸 United States (25.4%) | 🇺🇸 United States (74.2%) |
|---|
| Direct Visits / mo | 105.1M | 2.03K |
|---|
| User Rating | 4.8 | 4.6 |
|---|
| Supported Platforms | Website | Website |
|---|

Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Spanning GPT-6 Astra ($10/$50 per MTok), GPT-6.1 Sol ($2/$10), GPT-6.1 Terra ($1/$5), and GPT-6 Luna ($0.10/$0.50), all with a 1,050,000-token context window and 128K max output.
Tune thinking token budgets per API request across six granularity levels (`none`, `low`, `medium`, `high`, `xhigh`, `max`) to balance latency, accuracy, and cost.
Combine model inference with hosted web search, file search, function calling, and autonomous GUI computer-use actions in a single stateful API call.
Build ultra-low-latency multimodal voice agents billed per second ($0.05/minute) without rounding up to whole minutes.
A native, fast AI chat client for Mac, iPad, and iPhone
The keyboard extension brings AI text generation into Messages, Notes, Mail, and any other app on your device, so you never have to switch contexts to ask a question.
Talk to your assistant hands-free and hear spoken replies, with Siri Shortcuts for triggering a chat without opening the app.
Switch between different AI models and providers for different tasks, and keep a curated prompt library ready for recurring needs.
Generate images from text prompts, discuss photos inside a conversation, and translate text between languages without leaving the chat.

OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
#1
Provides direct API access to Google's Gemini models with generous free prototyping tiers, but lacks OpenAI's ecosystem breadth.
#2
Free / Open-sourceAlibaba Cloud's 4th-generation multimodal AI assistant and foundation model lineup (Qwen4-Max, Qwen4-Plus, Qwen4-Flash & open-weight Qwen4-27B) with 1M context.

Unifies hundreds of third-party models under a single API key, offering greater model choice than OpenAI's curated catalog.

SpecialistOne app to chat with GPT, Claude, Gemini and hundreds of other AI models

Provides developer APIs for Zhipu AI's proprietary GLM models, serving as an alternative enterprise foundation model stack.

All-in-one AI assistant across web, browser, desktop and mobile

SpecialistOptimized for lightning-fast serverless execution of generative media and image models, rather than general text LLMs.

Your AI agent for the browser: chat, automate and create from one sidebar

Specializes in high-performance serverless inference and dedicated GPU clusters for open-source models, bypassing closed commercial restrictions.
One-click AI assistant for browsing, writing and research

SpecialistOne AI super app for chat, images, video and everyday document tasks
OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
Provides direct API access to Google's Gemini models with generous free prototyping tiers, but lacks OpenAI's ecosystem breadth.
Free / Open-sourceAlibaba Cloud's 4th-generation multimodal AI assistant and foundation model lineup (Qwen4-Max, Qwen4-Plus, Qwen4-Flash & open-weight Qwen4-27B) with 1M context.
Unifies hundreds of third-party models under a single API key, offering greater model choice than OpenAI's curated catalog.
SpecialistOne app to chat with GPT, Claude, Gemini and hundreds of other AI models
Provides developer APIs for Zhipu AI's proprietary GLM models, serving as an alternative enterprise foundation model stack.
All-in-one AI assistant across web, browser, desktop and mobile
SpecialistOptimized for lightning-fast serverless execution of generative media and image models, rather than general text LLMs.
Your AI agent for the browser: chat, automate and create from one sidebar
Specializes in high-performance serverless inference and dedicated GPU clusters for open-source models, bypassing closed commercial restrictions.
One-click AI assistant for browsing, writing and research
SpecialistOne AI super app for chat, images, video and everyday document tasks