Best LLMs for Batch Text Translation

Output schema

Every answer on this task is checked against this JSON Schema, whichever model wrote it. An answer that doesn't fit counts as a model failure, and the call is retried on another model.

{
  "$defs": {
    "BatchTranslationItem": {
      "description": "One translated item in a batch translation result.",
      "properties": {
        "index": {
          "description": "0-based index of this item in the input list. Must match the input order.",
          "title": "Index",
          "type": "integer"
        },
        "translated_text": {
          "description": "Translated text for the item at this index.",
          "title": "Translated Text",
          "type": "string"
        }
      },
      "required": [
        "index",
        "translated_text"
      ],
      "title": "BatchTranslationItem",
      "type": "object"
    }
  },
  "description": "Batched translation: translate a list of texts in a single LLM call.\n\nThe output items list MUST be the same length as the input list, with index\nvalues 0..N-1 in order. Each translated_text corresponds to the input at the\nsame index.",
  "properties": {
    "items": {
      "description": "Translations in the same order as the input list. Length must equal the input list length.",
      "items": {
        "$ref": "#/$defs/BatchTranslationItem"
      },
      "title": "Items",
      "type": "array"
    }
  },
  "required": [
    "items"
  ],
  "title": "BatchTranslationResult",
  "type": "object"
}