ChatGPT vs Grok
A feature-by-feature comparison of ChatGPT and Grok across 7 capability categories.
Modalities — ChatGPT Wins
| Feature | ChatGPT | Grok |
|---|---|---|
Text Input | Yes. Core feature | Yes. Core feature |
Image Upload / Vision | Yes | Yes |
Image Generation | Yes, requires plus plan. DALL-E 3 | Yes |
Voice Mode | Yes, requires plus plan. Advanced voice mode | No |
Video Understanding | Yes. Via file upload/YouTube | No |
Video Generation | Yes, requires plus plan. Sora video generation is available inside ChatGPT on paid plans. | No. Not a video generation product. |
File Upload (PDF, DOCX) | Yes | No |
Code Execution | Yes, requires plus plan. Advanced Data Analysis | No |
Audio Input | Yes | No |
Canvas / Artifact Editor | Yes. Canvas feature | No |
Screen Sharing / Computer Use | Paid Only. Advanced Voice on iOS and Android can share the screen for eligible subscribers. Live Voice does not support screen sharing. | No |
Memory & Context — ChatGPT Wins
| Feature | ChatGPT | Grok |
|---|---|---|
Persistent Memory | Yes, requires plus plan | No |
Large Context Window | Partial. Standard context | Partial. Standard context |
Custom Instructions | Yes | No |
Conversation History | Yes | Yes |
Integrations — Tie
| Feature | ChatGPT | Grok |
|---|---|---|
Web Search / Browsing | Yes | Yes. Real-time focus |
Plugins / Extensions | No. Replaced by GPTs | No |
API Access | Yes, requires pro plan | Yes, requires pro plan |
Zapier Integration | Yes | Yes. Zapier lists Grok by xAI as an official app. Zaps can Ask Grok, categorize text, extract fields from text or images, and generate images from a prompt. |
Custom GPTs / Bots | Yes. Custom GPTs / GPT Store | No |
Real-time Collaboration | Partial. Chats can be shared and Projects shared with a team, but there is no live multiplayer session. | No |
Live Social Data Integration | No. No live social firehose; web search is general web, not X/Twitter streams. | Yes. Real-time X data |
Live Citation Mapping | Partial. Search and Deep Research cite sources in the thread; it is not a dedicated citation-map UI like Perplexity. |
Developer — ChatGPT Wins
| Feature | ChatGPT | Grok |
|---|---|---|
Function Calling | Yes, requires pro plan | Yes. The xAI API supports function calling: you define custom tools and Grok returns tool-call requests for your app to execute, alongside built-in tools such as web search, X search, and code interpreter. |
Streaming Responses | Yes | Yes. The xAI API streams Grok text output over Server-Sent Events. Set stream: true on chat completions; all text-capable Grok models support it, including grok-4.6. |
Fine-Tuning | Yes, requires pro plan | No |
Embeddings API | Yes, requires pro plan | No |
Structured Output (JSON) | Yes | No |
Reasoning / Thinking Mode | Yes. Auto populated | Yes. Auto populated |
Local Execution | No. Closed weights; runs only on OpenAI infrastructure. | |
Open Weights | No. Closed weights; GPT models are not downloadable. | |
Multi-Agent Orchestration | Partial. Agent / Operator can run multi-step tool use; it is not a user-facing swarm of sub-agents like Claude Agent Teams. | Yes. Four-agent backend |
Platforms — ChatGPT Wins
| Feature | ChatGPT | Grok |
|---|---|---|
Web App | Yes | Yes |
iOS App | Yes | Yes. Via X app |
Android App | Yes | Yes. Via X app |
Desktop App | Yes | No |
Chrome Extension | No | No |
Privacy — ChatGPT Wins
| Feature | ChatGPT | Grok |
|---|---|---|
GDPR Compliant | Yes | Yes |
Opt Out of Data Training | Yes | No |
Enterprise Privacy Mode | Yes, requires enterprise plan | No |
Workspaces — ChatGPT Wins
| Feature | ChatGPT | Grok |
|---|---|---|
Projects / Folders | Yes. Projects feature | No |