AI Agent Index
ByHeather MacAvelia·Last verified Jul 7, 2026
ChatGPT logo

ChatGPT

4.4/ 5

by OpenAI

Independently Reviewed
Visit chatgpt.com

OpenAI's general-purpose AI platform with GPT-5.5, ChatGPT Agent, Tasks, and Deep Research. Free; Go $8, Plus $20, Pro from $100/month. 500M+ weekly users.

ChatGPT is OpenAI's general-purpose AI platform, used by more than 500 million people weekly across consumer, developer, and enterprise contexts. Over 2025 and 2026 it grew from a chat assistant into a multi-modal agentic platform that runs on the GPT-5.5 model family (GPT-5.5 Instant, GPT-5.5 Thinking, and GPT-5.5 Pro) and executes autonomous work across web browsing, research, code, and file analysis. It serves individual knowledge workers, engineering teams, and enterprises rather than any single vertical. Agentic surface: ChatGPT Agent completes multi-step web tasks such as form submission, booking, and research compilation, pausing only for logins, payments, and other sensitive actions. Deep Research runs autonomous 5 to 30 minute investigations across many sources and returns cited reports. Tasks execute scheduled work between sessions, Codex handles software engineering, and Custom GPTs let teams deploy domain-specific assistants without code. Integration depth: the Business plan connects natively to Microsoft 365, Google Drive, Slack, GitHub, Linear, and Figma, with more in the app directory and a connector registry on Enterprise. The API, GPT Actions, and Custom GPTs extend reach to CRMs, databases, and internal tools. ChatGPT connects out to external MCP servers as a client, but OpenAI does not publish its own MCP server for other systems to connect into. Pricing (USD, individual tiers public): Free at $0 with limited GPT-5.5 Instant and limited deep research. Go at $8 per month with more messages and uploads, and this tier may include ads. Plus at $20 per month with GPT-5.5 Thinking, expanded agent mode and deep research, projects, tasks, and Custom GPTs. Pro from $100 per month with 5x or 20x usage, GPT-5.5 Pro, and unlimited GPT-5.3. Business at $20 per user per month billed annually ($25 monthly, minimum 2 users) unifies ChatGPT and Codex with SAML SSO, MFA, and no training on business data. Business and Enterprise can purchase credits for agent, Codex, and Office extension usage beyond the included pool. Enterprise is custom priced. Who it is not for: ChatGPT is broad rather than deep, so vertical specialists outperform it in their lanes. Regulated legal research is better served by Harvey AI (custom pricing), sales-call analysis by Gong (custom pricing), and per-resolution support automation by Intercom Fin ($0.99/mo). Meaningful autonomous volume also requires Pro at $100 per month or above, since Plus rate-limits agent mode. Current state Q3 2026: GPT-5.5 is the default across paid tiers, with GPT-5.3 unlimited on Pro. Business pricing is unified at $20 per user per month annually, and Business and Enterprise agent, Codex, and Office extension usage now draws from an included pool with credit-based extension. SOC 2 Type 2, ISO/IEC 27001:2022, and ISO/IEC 42001:2023 are confirmed on OpenAI's security page; GDPR, CCPA, and HIPAA are supported through a Data Processing Addendum and Business Associate Agreement rather than held as certifications.

Pricing

freemium · $20

View pricing ↗

Segment

b2b

Setup

easy

Verified

Jul 7, 2026

Transparency

Public

Contract

Monthly or Annual

Data training

Opt-out

Autonomy

Human Optional

Capabilities

content-creationweb-searchdata-analysiscode-generationagent-modedeep-researchno-code

Pros & Limitations

Editorial assessment

Pros

  • One subscription spans the widest agentic surface at the Plus price point: ChatGPT Agent automates web tasks, Deep Research returns cited reports, Codex writes and ships code, and Tasks run between sessions, all within the $20 per month Plus tier.
  • The GPT-5.5 family handles multimodal analysis, long-context reasoning, and image generation without separate subscriptions or API keys, giving more model breadth per dollar than any comparable AI subscription.
  • Custom GPTs and the API let teams deploy domain-specific agents with no ML infrastructure, from a CRM assistant to a data analyst, and share them across a workspace or publicly.

Limitations

  • Autonomous features are rate-limited on Plus: agent mode struggles with complex multi-step flows involving authentication or dynamic pages, and Pro at $100 per month is the practical minimum for meaningful autonomous volume.
  • Data training is opt-out rather than off by default on Free, Go, and Plus, so protecting sensitive conversations requires an active settings change, unlike the no-training default on Business and Enterprise.
  • General-purpose breadth means less depth than vertical specialists: Harvey AI (custom pricing) leads on legal research, Gong (custom pricing) on call analysis, and Intercom Fin ($0.99/mo) on support resolution.

Technical Details

Deployment
webapimobile
Model architectureGPT-5.5 Instant / GPT-5.5 Thinking / GPT-5.5 Pro
Avg setup time< 5 minutes (web app or mobile app, free account, no configuration required)
Autonomous rateChatGPT Agent completes web-based tasks autonomously without per-step approval. Deep Research runs 5-30 minutes across hundreds of sources without interruption. Tasks execute between sessions. Meaningful autonomous volume requires Pro ($100/month or above).
Integrations
Microsoft 365Google DriveSlackGitHubLinearFigma
Security
SOC 2 Type IIISO 27001ISO 42001GDPRHIPAACCPA

Similar agents

Rating

4.4/ 5

Editorial score

How we score this →

Score breakdown

AutCap 4 · IntDepth 4 · PriceTrans 5 · IndEvid 5 · SetupAcc 5 = 4.40

Industries

B2BEnterpriseSMBStartups

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