Best LLMs for Publication Title Package Generation

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": {
    "EditorChoice": {
      "description": "The LLM's recommended best title from the generated variants.",
      "properties": {
        "meta_description": {
          "description": "SEO meta description shown as the Google search snippet. Target ≤155 characters. One sentence, present tense, summarising the takeaway. No clickbait, no ellipses.",
          "title": "Meta Description",
          "type": "string"
        },
        "meta_title": {
          "description": "SEO/social title used for the \u003ctitle\u003e tag and og:title. Target ≤60 characters — Google truncates beyond that in search results. Must convey the main idea standalone (assume the reader sees nothing else). Front-load subject + outcome; avoid filler ('A Look At...', 'Insights On...').",
          "title": "Meta Title",
          "type": "string"
        },
        "rationale": {
          "description": "2-3 sentence explanation of why this title was chosen as the best fit for the content",
          "title": "Rationale",
          "type": "string"
        },
        "selected_category_code": {
          "description": "The category_code of the recommended best title",
          "title": "Selected Category Code",
          "type": "string"
        }
      },
      "required": [
        "selected_category_code",
        "rationale",
        "meta_title",
        "meta_description"
      ],
      "title": "EditorChoice",
      "type": "object"
    },
    "TitleVariant": {
      "description": "A single title/subtitle variant for a specific category.",
      "properties": {
        "category_code": {
          "description": "The category code this variant belongs to",
          "title": "Category Code",
          "type": "string"
        },
        "subtitle": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "default": null,
          "description": "Publication subtitle (10-20 words)",
          "title": "Subtitle"
        },
        "title": {
          "description": "Publication title (5-12 words)",
          "title": "Title",
          "type": "string"
        }
      },
      "required": [
        "category_code",
        "title"
      ],
      "title": "TitleVariant",
      "type": "object"
    }
  },
  "description": "Output model for publication title generation.\nGenerates one title/subtitle per configured category,\nthen selects the best (Editor's Choice) with rationale.",
  "properties": {
    "editors_choice": {
      "$ref": "#/$defs/EditorChoice",
      "description": "The recommended best title variant with rationale"
    },
    "variants": {
      "description": "One title/subtitle variant per configured category",
      "items": {
        "$ref": "#/$defs/TitleVariant"
      },
      "title": "Variants",
      "type": "array"
    }
  },
  "required": [
    "variants",
    "editors_choice"
  ],
  "title": "TitleGenerationOutput",
  "type": "object"
}