Guide
Which AI subscription works with which agent in 2026
Can you run OpenClaw or your own agent on a Claude or ChatGPT subscription? What each provider allows today, what changed in 2026, and when an API key is the only sensible choice.
Updated 2026-09-15
You pay for Claude or ChatGPT every month. You want an agent that runs all day on a Mac mini. Can the subscription pay for the agent too?
Sometimes. The answer depends on the provider, on the tool, and on whether the agent is for you or for your customers. It has also changed several times this year.
The short answer
Checked in September 2026. Provider terms change often, so check the official pages linked at the end before you build on any of this.
| You want to | Use |
|---|---|
| Run a personal agent for yourself, on ChatGPT | Your ChatGPT subscription, signed in through OpenClaw or Codex |
| Run a personal agent for yourself, on Claude | Claude Code or the official Claude CLI with your subscription; check current terms for third-party tools |
| Run an agent your company depends on | An API key |
| Run an agent that serves your customers | An API key, always |
| Keep simple tasks off the cloud entirely | A local model on the Mac |
Subscriptions and API keys are different products
A subscription (Claude Pro or Max, ChatGPT Plus or Pro) is a flat monthly price for a person. Usage limits are generous because most people use far less than the limit.
An API key is billed by usage: you pay for the tokens your agent actually consumes. It costs more for heavy use, but the terms are written for software, the billing is predictable per request, and nobody changes the rules on you overnight.
Agents break the subscription model. A chat has pauses. An agent runs loops, retries and long tool chains, day and night. That is why providers keep adjusting what subscriptions may be used for.
Claude: what changed in 2026
Claude subscriptions, 2026
- 4 AprilPro and Max limits stop covering third-party agents such as OpenClaw. Users are pointed to pay-as-you-go billing.
- 13 MayA separate monthly credit for programmatic use is announced, to start on 15 June.
- 15 JuneOn the day it was due, the change is paused. Those uses draw from the subscription as before.
- April 4. Anthropic stopped Claude Pro and Max limits from covering third-party agents such as OpenClaw. Users were pointed to pay-as-you-go billing instead.
- May 13. Anthropic announced a separate monthly credit for programmatic use (the Agent SDK, claude -p, GitHub Actions and third-party apps), to start on June 15.
- June 15. On the day it was due, Anthropic paused that change. For now, those uses draw from the subscription as before, and no separate credit exists. Anthropic says it will give notice before any future change.
Where that leaves you:
- Claude Code and the official CLI, used by you: covered by your subscription.
- Third-party tools: results depend on how the tool connects. Tools that go through the official Claude CLI or Agent SDK generally work. Tools that connect in other ways may be billed as extra usage or rejected.
- Products and services for other people: Anthropic's terms say developers building products or services should use an API key.
ChatGPT: subscription sign-in is supported
OpenAI takes the opposite approach. Its models can be used in external tools such as OpenClaw by signing in with a ChatGPT account, and OpenClaw's documentation states that OpenAI explicitly supports this.
In OpenClaw, choose the OpenAI provider during onboarding and sign in with your ChatGPT account instead of pasting an API key. Your plan's usage limits apply.
That covers your own use. For a product that serves customers, OpenAI's API is still the right tool.
When an API key is the only sensible choice
- Your customers talk to the agent. A personal subscription is for the person who pays for it, not for everyone who uses your app.
- The business stops if the agent stops. If a subscription account is limited or its terms change, every automation on it stops at once.
- You need to know the cost of each task. API billing shows exactly what each request cost.
- Several people or systems share the agent. Subscriptions are per person.
The option nobody bills you for: local models
A Mac mini can run small language models itself. They are not as capable as the largest cloud models, but they handle routine work well: sorting messages, extracting data from documents, classifying requests, drafting short replies.
A common pattern:
- 1A local model handles the simple, frequent requests.At no cost per request.
- 2A cloud model takes only what needs real reasoning.The minority of requests where judgement matters.
Fewer tokens sent to the cloud means a smaller bill, whichever way you pay. The guide below covers what runs on each memory size.
A setup that survives the next policy change
- Keep your agent model-agnostic. OpenClaw and most agent frameworks can switch providers in configuration. Don't hard-wire one.
- Configure a fallback. If the main provider fails or blocks a request, fall back to a second provider or a local model.
- Log usage per task. When pricing changes, you will know what it means for you in minutes, not weeks.
- Read the provider's terms before you launch, not after.
Official sources
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