Open AI Chat GPT Ecosystem

OpenAI ChatGPT AI Ecosystem

MODELS

GPT Series (General Purpose/Multimodal)

• GPT-5 — Current flagship. Natively multimodal (text/image/audio/video), 256K context, integrated tools, persistent memory. Variants: Standard, Mini, Nano.

• GPT-5.1 — Latest upgrade. Improved conversation quality and instruction-following. Variants: Instant (speed-optimized), Thinking (reasoning-optimized).

• GPT-4o — Previous flagship, still widely used. Default for most users. Multimodal, powers Advanced Voice Mode.

• GPT-4.1 — Built on 4o architecture. Improved coding, instruction-following, long-context (1M tokens). Variants: Mini, Nano.

o-Series (Reasoning Models)

• o3 — Deep reasoning via "private chain-of-thought." Excels at logic, coding, math, science. Agentic tool use. Premium pricing for complex problems.

• o3-pro — Same architecture as o3 with extended compute time. Optimized for reliability over speed.

• o4-mini — Cost-efficient reasoning model. Strong STEM benchmarks at fraction of o3 cost.

Specialized Models

• GPT-5-Codex / GPT-5.1-Codex-Max — Agentic software engineering models powering Codex product.

• gpt-image-1 — Image generation (replaces DALL·E). Generation, inpainting, editing. Native to ChatGPT.

• gpt-oss-120b/20b — Open-weight reasoning models (Apache 2.0 license) for self-hosting and customization.

CONSUMER PRODUCTS

• ChatGPT — Main conversational interface. 800M+ weekly active users. Web, iOS, Android, macOS, Windows desktop apps.

• ChatGPT Agent — Unified agentic system (merged Operator + Deep Research). Uses virtual computer to navigate websites, run code, create documents, complete multi-step tasks. Access via "agent mode" in composer. Limits: 400 messages/month (Pro), 40 (Plus/Team).

• Deep Research — Multi-step research agent. Browses hundreds of sources, synthesizes comprehensive reports. 5-30 minutes per query. Powered by o3/o4-mini.

• Codex — Cloud-based software engineering agent. Parallel sandbox environments for coding tasks. GitHub integration, PR creation, testing. Available in ChatGPT sidebar + CLI. OpenAI engineers merge 70% more PRs/week; Cisco cut review times 50%.

• Sora 2 — Video and audio generation. Up to 25 seconds (120s claimed in storyboard mode). Realistic video with synchronized dialogue, sound effects. Improved physics simulation and world modeling.

• Canvas — Collaborative workspace for writing and code. Real-time editing, formatting, export (PDF/Word/Markdown/code). Works with voice mode. Record mode for meeting transcription to summaries.

• Projects — Workspace containers. Organize conversations, uploaded files (40 max), custom instructions per project.

• Custom GPTs — User-created specialized assistants. Custom instructions, knowledge bases, capabilities. GPT Store for discovery and sharing.

• Memory — Persistent context across conversations. Saved memories + chat history insights. User-controllable, available to Free users.

• Advanced Voice Mode — Real-time voice conversations powered by GPT-4o. Natural speech patterns, interruptible. Mobile + desktop.

• Image Generation — Native creation via gpt-image-1. Images saved to Library. Generation, editing, inpainting.

DEVELOPER PLATFORM

• OpenAI API — REST API access to all models. Text, vision, audio, tool use, function calling.

• Apps SDK — Build interactive apps running inside ChatGPT. Launch partners: Canva, Figma, Spotify, Zillow, Coursera. Announced DevDay 2025.

• AgentKit — Production agent toolkit. Agent Builder (visual canvas), ChatKit (embeddable chat interfaces), Evals for Agents, Connector Registry.

• Codex CLI — Open-source command-line coding agent for terminal-based development.

• Codex SDK — Embed Codex agentic coding capabilities into custom workflows and applications.

• Realtime API — Speech-to-speech with low latency. Models: gpt-4o-transcribe, gpt-4o-mini-transcribe, gpt-4o-mini-tts.

• MCP Connectors — External data source integrations. Google Drive, Slack, GitHub, Jira, Notion, Atlassian Rovo, HubSpot, and more.

SUBSCRIPTION TIERS