Can you use your Claude subscription with oh-my-pi or Pi?
Anthropic's terms reserve Claude Pro and Max sign-in for Claude Code and its own apps, so it is not a supported way to run oh-my-pi or Pi, even though both list an Anthropic login. A Max plan does include monthly API credits, $100 on Max 5x and $200 on Max 20x, which work with an Anthropic API key in either agent. Pro has no API credits, so Pro users pay per token or use a fixed-price API such as Standard Compute from $19 a month.
Every way to run Claude in oh-my-pi or Pi
| Route | Cost | Limit | Setup |
|---|---|---|---|
| Max monthly API credits | Included in Max 5x and Max 20x | $100 (Max 5x) or $200 (Max 20x) of API use a month, no rollover | Link a Console organization in claude.ai billing, then use an API key from it |
| Anthropic API key | Per million tokens: Sonnet 5.5 $2 / $10, Opus 5.5 $4 / $20, Fable 5.1 $10 / $50 | None: the bill grows with use | /login with an API key, or ANTHROPIC_API_KEY |
| Claude Pro or Max sign-in | Plan price | Outside Anthropic's terms for third-party apps | Don't rely on it |
| Standard Compute | From $19 a month | $20 compute budget on Starter, then requests stop | OpenAI-compatible provider at https://api.stdcmpt.com/v1 |
Sources: Anthropic's authentication terms, Max API credits and Claude pricing, checked October 14, 2026.
What Claude costs per coding-agent day on an API key
| Model | Median day | Busy day | 20 median days |
|---|---|---|---|
| Sonnet 5.5 | $3.67 | $29.55 | $73 |
| Opus 5.5 | $7.34 | $59.10 | $147 |
Our median and 90th-percentile coding-agent day on the Standard Compute gateway, September 14 to October 13, 2026, priced at Anthropic's list prices. Pooled traffic from OpenCode, Kilo, Cline and other agents. On these figures, Max 5x's $100 of credits covers about 27 median Sonnet 5.5 days a month, or 13 on Opus 5.5.
Which to pick
- You already pay for Max: claim the monthly API credits and put that key in Pi or oh-my-pi.
- You use Claude lightly and want one exact model: an Anthropic API key. Cache reads keep light use cheap.
- You run Pi as your daily agent, with long sessions and subagents: a fixed monthly plan, so a long loop can't grow the bill.
About Pi and oh-my-pi
Pi (pi.dev, by Mario Zechner) is a minimal open-source coding agent; oh-my-pi is its coding-first fork. Both are MIT-licensed and connect to many providers through API keys, sign-ins or custom providers in ~/.pi/agent/models.json and ~/.omp/agent/models.yml, so which model you pay for is your choice.
The catch
A Claude Pro or Max sign-in inside a third-party agent is the route Anthropic's terms rule out, and Anthropic says it may enforce that without notice. Max's API credits expire at the end of each billing cycle, and use beyond them is billed at API rates.
Where Standard Compute fits
Standard Compute works in Pi and oh-my-pi as an OpenAI-compatible provider at https://api.stdcmpt.com/v1 with the model standardcompute. Plans start at $19 a month for a $20 compute budget, and requests stop at the budget instead of billing overage. Smart routing sends hard requests to Claude-class models and routine ones to efficient models; an exact model ID pins one model.
FAQ
Can oh-my-pi use my Claude Pro subscription?
Not in a supported way. Pro comes with no API credits, and its sign-in is meant for Claude Code and Anthropic's own apps. A Pro user who wants Claude in oh-my-pi adds an Anthropic API key and pays per token, or uses a fixed-price API that serves Claude-class models.
Can I use my Claude Max plan in Pi?
Yes, through its monthly API credits: $100 on Max 5x and $200 on Max 20x. On claude.ai, open Settings, then Billing, link a Claude Console organization, create an API key there and add it to Pi. Unused credits don't roll over.
What does Claude cost per month in Pi on an API key?
On our measured coding-agent traffic, a median day costs $3.67 on Sonnet 5.5 and $7.34 on Opus 5.5 at list prices, about $73 and $147 over 20 working days. A busy day, the 90th percentile, costs $29.55 on Sonnet 5.5.
What is the cheapest way to run oh-my-pi?
Free models or a local model through Ollama cost nothing per token. For paid models, a fixed-price API from $19 a month, keeping an exact model ID for the tasks that need one specific model.