# source_too_large_for_model

The conversation and source are too long for the assistant to read in one turn.

## What happened

Each turn sends the conversation and the source to the assistant, and the text has a size limit. A turn over it is refused with 413 before anything is reserved, so nothing is charged.

## What to do

Start a new chat with a smaller or simpler source.

## Example

```json
{
  "error": "This conversation is too long for a single turn \u2014 start a new chat.",
  "code": "source_too_large_for_model"
}
```