Public Marshall

Public Marshall is model chat without sign-in, with up to $100 of free, sponsored model usage per browser visitor. Use it to plan experiments, compare approaches, write code and ask questions about models and compute.

Open Public Marshall and send a message. Replies appear as they are generated. Public Marshall uses the production default model; it has no shell, files, uploads, cluster access or tools that perform actions on your behalf.

Conversation lifetime

The conversation stays in the page's memory. Refreshing or closing the page clears it; there is no saved conversation to recover. New experiment also clears the current conversation. Use Stop to interrupt an active reply before starting a new experiment. Neither action resets the usage allowance.

Sign in to save Marshall sessions, connect a shell and work with persistent files. Signing in does not automatically save or import the public conversation you already wrote.

Visitor allowance

The $100 allowance lasts for the browser visitor's lifetime; it does not reset daily or monthly. A separate secure cookie identifies the visitor and preserves the remaining allowance across page refreshes. The cookie does not contain conversation history. Keep cookies enabled to retain access to that allowance. The visitor is a browser identity, not a verified person or an account; the allowance is not synchronized across browsers.

The cookie lasts for 365 days and is renewed when the page reconnects. Deleting it or letting it expire loses access to that visitor's remaining allowance; signing in cannot recover it.

Before each reply, the service reserves enough allowance to cover its maximum model usage. Confirmed usage replaces that reservation when the reply finishes. An interrupted reply with unknown usage keeps its reservation until the cost is confirmed. Waiting or refreshing does not release an uncertain reservation.

A new reply is refused when the remaining allowance cannot cover its reservation, even if some allowance remains. The offer is therefore up to $100, not a guarantee that every remaining fraction can fund a reply. Sign in to continue using Marshall after the public allowance is exhausted. The allowance covers public model chat, not compute capacity, cash withdrawals or a transferable account credit.

Data retained

Public Marshall does not store prompts, replies or conversation identifiers in its session or usage records. It retains the visitor credential's hash, allowance reservations, token counts, model usage and costs. Request limits use a hashed client address; these records do not contain the chat text.

Public chat does not enter the organization-level Marshall data-sharing program. Signed-in workspace sessions follow that program's settings.

Request limits

These are the current public chat limits. Browsers using the same client address share its request limits.

Limit	Value
Visitor allowance	$100 lifetime model usage
New visitor grants	5 per hour per client address
Chat requests	10 per minute per client address
Active replies	1 per visitor; 32 across Public Marshall
Conversation request	64 KiB, including at most 64 text messages
Reply output	At most 4,096 tokens
Model response stream	512 KiB, including usage metadata
Model reply timeout	120 seconds
Execution slot after an unresolved request	180 seconds; the cost reservation remains

An incomplete reply stays visible until the page is cleared, but is excluded from the next message's model context. The app does not automatically retry a submitted message: a second submission can incur more model usage. Use Stop to interrupt a reply. Stopping does not erase usage already incurred or release a reservation whose cost is still unknown.

Refusals and interrupted replies

Code	Meaning and next step
allowance-exhausted	The allowance cannot cover another reply; sign in to continue
rate-limited	A request or active-reply limit was reached; wait and try again
visitor-required	Reopen the public page with cookies enabled; an invalid or revoked visitor cookie cannot restore its allowance
message-too-large	The conversation request exceeds the size limit; shorten it or start a new conversation
invalid-request	The request is malformed or the message limit was reached; send a shorter text conversation from the public page
request-already-used	That message identifier was already submitted; it is not dispatched again
request-cancelled	The request was cancelled before model dispatch
reply-interrupted	The reply did not complete; if usage is unconfirmed, its reservation remains until reconciled
model-temporarily-unavailable	A bounded model request is unavailable; try again later
public-marshall-unavailable	The service cannot confirm admission or accounting; try again later
origin-refused or proxy-proof-refused	The request did not come through an accepted public-page connection; reopen the public page