# CLIPScore

- id: src_01M569GDQ8MHG3Q49N933CJEGV
- type: source · status: active · revision: 2
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=metadata_checked, execution=not_run, review=unreviewed
- categories: T20, T05 · tags: clipscore, metric, image-text-alignment, reference-free, level:beginner, code:python
- updated: 2026-10-18T01:24:19.298Z
- url: https://veyrul.com/sources/src_01M569GDQ8MHG3Q49N933CJEGV

Source: https://github.com/jmhessel/clipscore

```json
{
  "archived": false,
  "revision": {
    "ref": "main",
    "pinned": false
  },
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Original code for CLIPScore (EMNLP 2021), a reference-free image-text alignment metric based on CLIP; the common 'prompt-match' number in text-to-image and video papers.",
  "source_type": "repository",
  "availability": "available",
  "dependencies": [],
  "source_owner": "Jack Hessel et al.",
  "next_check_at": "2026-11-16T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": null,
  "known_limitations": [
    "Saturates on detailed prompts; CLIP-version dependent; code inactive since 2022."
  ],
  "upstream_updated_at": "2022-12-16T23:47:24.000Z"
}
```

Evidence claims:
- [sourced_fact] README: code for the EMNLP 2021 paper CLIPScore: A Reference-free Evaluation Metric for Image Captioning; the metric needs no reference captions. · locator: README intro · source: https://github.com/jmhessel/clipscore
- [sourced_fact] Repo metadata: MIT (Copyright 2021 Hessel et al.), not archived, last push 2022-12-16. · locator: GitHub API fields; LICENSE header · source: https://api.github.com/repos/jmhessel/clipscore
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.

Rights:
- code: license=MIT hosting=permitted redistribution=permitted modification=permitted training=unknown · MIT; CLIP weights have separate terms. · evidence: https://github.com/jmhessel/clipscore/blob/main/LICENSE

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