ChatGPT

ChatGPT supports multimodal input, accepting images, PDFs, and documents alongside text prompts. Image understanding is fully functional, allowing detailed visual analysis.

Real-time web search is integrated, providing live, up-to-date information with source citations.

A sandboxed code execution environment allows users to run Python code, create visualizations, and perform data analysis directly in the chat. The data analysis capabilities are particularly robust, supporting CSV/Excel file processing.

ChatGPT offers an advanced voice mode for natural spoken conversation, enabling hands-free interaction with low-latency responses.

Responses stream token-by-token, providing immediate feedback and a more natural conversational flow.

A fully documented REST API is available for programmatic integration, enabling developers to build custom applications and workflows.

Built-in image generation allows users to create, edit, and iterate on images directly within the conversation.

Deep research mode enables comprehensive multi-source analysis. Persistent memory across conversations personalizes the experience over time. Custom GPTs/agents allow users to create specialized assistants. Function calling enables structured tool use. Canvas mode provides a side-by-side editing workspace.

ChatGPT offers a free tier: Free (GPT-5.4 mini, limited). The free tier has notable restrictions but remains useful for casual users.

The lowest paid plan starts at $20/month ($20/mo (GPT-5.4, DALL·E, Advanced Voice)). This is competitive with the market standard.

The pricing model is SUBSCRIPTION. Higher tiers include: $200/mo (Unlimited, o3-pro, Prism). Enterprise options: Custom (SSO, SOC 2, SLA).

Rate limits are documented in the API documentation with usage caps varying by plan tier.

Enterprise plans offer additional value: Custom (SSO, SOC 2, SLA) Team plans are also available: $25–30/user/mo (Workspace, Admin).

ChatGPT is GDPR-compliant with a publicly available Data Processing Agreement (DPA). European users can use the service with confidence that their data is handled according to EU regulations.

Data is processed on servers in US, EU. EU data residency is available, which is critical for European businesses and GDPR compliance.

Users can opt out of having their data used for model training, providing control over data usage.

Security certifications: SOC 2 Type II ✓ | No ISO 27001. No on-premise option available.

The web application provides a polished, responsive interface with fast load times and a feature-complete experience.

Native mobile apps are available for iOS and Android with near feature-parity to the web version.

Desktop availability: macOS ✓ | Windows ✓ | Linux ✗. Broad desktop coverage for professional workflows.

Third-party integrations: Slack, Zapier, Plugin Ecosystem.

The developer experience is strong with comprehensive API documentation, SDK support, and an active developer community. Function calling and tool use APIs enable sophisticated integrations.

New users can start immediately with the free tier — no credit card required. The onboarding process is streamlined, allowing productive use within minutes.