# 2.5 How the two leaders realize it (/ai-worker-paradigm/what-is-an-ai-worker/two-leaders) --- type: Document title: "2.5 How the two leaders realize it" description: "How Anthropic and OpenAI offer surfaces and models today, the three differences that change a decision, and what holds on either AI vendor." status: stable order: 102.5 ksor: owner: team:panaversity audience: [ public ] approval: by: process:panaversity at: 2026-10-06T21:00:42Z chapter: "02" part: I expert_status: required concepts: [ "2.5" ] last_verified: 2026-10-03 sources: - id: anthropic-one-claude-post title: "Claude Cowork and chat are now one Claude (Anthropic, 16 September 2026, verified 2026-10-03)" resource: https://claude.com/blog/cowork-is-now-claude - id: anthropic-projects title: "How can I create and manage projects? (Claude Help Center, verified 2026-10-03)" resource: https://support.claude.com/en/articles/9519177 - id: anthropic-research title: "Use research on Claude (Claude Help Center, 2 June 2026, verified 2026-10-03)" resource: https://support.claude.com/en/articles/11088861-use-research-on-claude - id: anthropic-artifacts title: "What are artifacts and how do I use them? (Claude Help Center, verified 2026-10-03)" resource: https://support.claude.com/en/articles/17153992-what-are-artifacts-and-how-do-i-use-them - id: anthropic-choosing-model title: "Choosing the right model (Anthropic platform documentation, verified 2026-10-06)" resource: https://platform.claude.com/docs/en/about-claude/models/choosing-a-model - id: anthropic-model-settings title: "Change the model, effort, and thinking settings (Claude Help Center, verified 2026-10-03)" resource: https://support.claude.com/en/articles/8664678-change-the-model-effort-and-thinking-settings - id: openai-work-and-codex title: "ChatGPT Work and Codex (OpenAI Help Center, verified 2026-10-06)" resource: https://help.openai.com/en/articles/20001275-chatgpt-work-and-codex - id: openai-projects title: "Projects in ChatGPT (OpenAI Help Center, verified 2026-10-06)" resource: https://help.openai.com/en/articles/10169521-using-projects-in-chatgpt - id: openai-deep-research title: "Deep research in ChatGPT (OpenAI Help Center, verified 2026-10-06)" resource: https://help.openai.com/en/articles/10500283-deep-research-in-chatgpt - id: openai-release-notes title: "ChatGPT release notes, entry for 29 September 2026 (OpenAI Help Center, verified 2026-10-06)" resource: https://help.openai.com/en/articles/6825453-chatgpt-release-notes - id: openai-space title: "Getting started with Space in ChatGPT (OpenAI Help Center, verified 2026-10-06)" resource: https://help.openai.com/en/articles/20001549-getting-started-with-space-in-chatgpt - id: openai-business-models title: "ChatGPT Business models and limits (OpenAI Help Center, verified 2026-10-06)" resource: https://help.openai.com/en/articles/12003714-chatgpt-business-models-and-limits generated: at: 2026-10-06T21:00:42Z by: esl-rewrite/1.2.0+ksor.1 trust_tier: unverified build_id: sha256:c93b28093c2f70c60faae2645a693d881b657ff94d00f7dd9f8c06427ff61c87 dirty: true ksor_version: 0.0.60 --- **In everyday life.** Two phone companies both sell small, medium and large plans, but the names and limits differ. You compare what each plan does for you, not what it is called. > **Anthropic, as verified 3 October 2026.** **Chat and tasks.** Since 16 September 2026, one Claude conversation routes between answering and tasks (Chapter 1).[^anthropic-one-claude-post] **Projects** hold standing instructions and a knowledge base of files for one area of work. Team and Enterprise members can share them.[^anthropic-projects] **Research**, on paid plans, runs several searches that build on each other, across the web and connected apps, and returns citations.[^anthropic-research] **Artifacts** open beside the conversation as documents, slide decks, designs, dashboards or small tools that you can edit, return to and share. **Claude Docs**, an artifact template on paid plans, lets a team write a document together with Claude in real time.[^anthropic-artifacts] Claude's models each have a job. Haiku is the fastest and lowest-cost. Sonnet offers speed and capability for everyday work. Opus is for complex agent work and enterprise work, and Anthropic says most workloads start with it. Fable is the most capable model open to all customers. The current versions are Haiku 4.5, Sonnet 5.5, Opus 5.5 and Fable 5.1.[^anthropic-choosing-model] One model menu next to the send button sets the model and its effort level, and you can change both at any point.[^anthropic-model-settings] Anthropic advises that tuning effort often works better than switching models.[^anthropic-choosing-model] Prices and the full model list are in the Associate companion's section on products and models. > **OpenAI, as verified 6 October 2026.** **Chat, Work and dots** are described in Chapter 1. Chat is for quick questions. Work is an agent for longer, multi-step work that delivers documents, spreadsheets, presentations, reports and Sites.[^openai-work-and-codex] **Projects** keep related chats, files and instructions together, and can be shared.[^openai-projects] From a project you can start a Work task that uses the project's context.[^openai-work-and-codex] **Deep research**, chosen from the tools menu, proposes a research plan you can edit, then returns a report with citations.[^openai-deep-research] **Space**, launched 29 September 2026,[^openai-release-notes] is a home for pages and files. Collaborators edit the same page, each with their own ChatGPT. Sharing a page does not give other people access to your private chats or memory. Anything written on the page is visible to everyone who can view it. Space is on Pro, Business and Enterprise plans.[^openai-space] Chat and Work have separate model pickers. On Business plans, you choose a reasoning level in chat, from Instant to Extra High, or Pro.[^openai-business-models] Work and Codex, OpenAI's coding agent, use their own models, with a Default option that sets the model and reasoning level together.[^openai-work-and-codex] The model list and usage rates are in the Associate companion's section on products and models. **The differences that change a decision.** Three matter. 1. **Where model choice is made.** On Anthropic, one model menu sets the model and effort for a conversation, and that conversation covers both answering and tasks. On OpenAI, chat and Work use separate model pickers, so the model you tried in chat may not be the one that runs the task. On either AI vendor, record the model and effort for each surface the worker uses. 2. **Where shared output is kept.** Both AI vendors let a team share a project for standing context. For a document the team edits together, Anthropic offers Claude Docs and OpenAI offers Space. In Space, each colleague brings their own assistant. Decide where the AP Worker's register is kept, and who can see it, before the first run. 3. **Tier names do not match one to one.** Compare models by the job each AI vendor gives them, from fastest and cheapest to most capable, and by your own tests, never by name. **The invariant.** The product names differ, but the way you decide does not. Choose the surface by how much of the work you hand over, the rung on Chapter 1's ladder. Choose the output by what you need to keep afterward. Choose the model by balancing capability, speed and cost, and test your choice on your own cases. Write the surface and the model in the Role Contract as runtime needs. Then you can change either one without changing the role or what it may do. You still retest the new setup. [^anthropic-one-claude-post]: Claude Cowork and chat are now one Claude, Anthropic, 16 September 2026. [^anthropic-projects]: How can I create and manage projects?, Claude Help Center. [^anthropic-research]: Use research on Claude, Claude Help Center, 2 June 2026. [^anthropic-artifacts]: What are artifacts and how do I use them?, Claude Help Center. [^anthropic-choosing-model]: Choosing the right model, Anthropic platform documentation. [^anthropic-model-settings]: Change the model, effort, and thinking settings, Claude Help Center. [^openai-work-and-codex]: ChatGPT Work and Codex, OpenAI Help Center. [^openai-projects]: Projects in ChatGPT, OpenAI Help Center. [^openai-deep-research]: Deep research in ChatGPT, OpenAI Help Center. [^openai-release-notes]: ChatGPT release notes, entry for 29 September 2026, OpenAI Help Center. [^openai-space]: Getting started with Space in ChatGPT, OpenAI Help Center. [^openai-business-models]: ChatGPT Business models and limits, OpenAI Help Center.