What's Changed

• Use the edition 2024 documents indexer in the dumps by @Kerollmops in #5762
• Regenerate all fragments when coming from a user-provided vector by @dureuill in #5763

Full Changelog: v1.16.0-rc.2...v1.16.0-rc.3

What's Changed

• Various fixes on the export route by @Mubelotix in #5753
• Fix: Preserve order of searchable attributes when modified by @ManyTheFish in #5751
• Introduce filters in the chat completions by @Kerollmops in #5710
• Fix Total Hits being wrong when rankingScoreThreshold is used by @Mubelotix in #5725
• Allow sorting on the /documents route by @Mubelotix in #5716
• Tests for multimodal by @Mubelotix in #5734
• Fix incorrect document count in stats after clearing all documents by @kametsun in #5754
• Fix chat settings dumpless upgrade by @Kerollmops in #5761

New Contributors

• @kametsun made their first contribution in #5754

See also

• All changes since RC.0
• RC.1 changelog
• RC.0 changelog

🦋 Bug fixes

• Fix the dumpless upgrade to v1.16 following the database changes introduced by the multimodal embedder feature, by @dureuill in #5737

Other improvements

• A Read-Only Admin key will be created in new empty databases, to prevent accidentally writing to database while investigating, by @Mubelotix in #5693

See also

• All changes since RC.0
• RC.0 changelog

Meilisearch v1.16 introduces two core features, multimodal embeddings allowing to index images, text and other formats; and the Export/Transfer of documents between instances easing the migration of a local Meilisearch into the cloud!

New features and updates 🔥

Multimodal embeddings

Meilisearch now allows conveniently indexing images, text and other formats in documents, and to retrieve documents by searching with an image or a text query.

This new feature leverages multimodal embedders to provide a common semantic representation for images, texts, and any other piece of data in a format supported by the chosen model.

As an example, the sample movies dataset contains movie descriptions and links to movie posters. Using this new feature, it is possible to use text to search both in the descriptions and the posters, or to use an image to search for similar looking posters, or movies with a description matching the query image.

Usage

To use multimodal embeddings, start by enabling the multimodal experimental feature:

curl $MEILISEARCH_URL/experimental-features -X PATCH -H 'Content-type: application/json' -d '{"multimodal": true}'

Then pick an embedder service that supports multimodal such as cohere or VoyageAI to start building the embedding configuration.

An example configuration for VoyageAI to index the description and poster from the movies database, and to search by text or image, might look like the following:

// PATCH /indexes/$INDEX_NAME/settings/embedders
{"voyage": {
  "source": "rest",
  "url": "https://api.voyageai.com/v1/multimodalembeddings",
  "apiKey": "$VOYAGE_API_KEY",
  // describes how we index documents
  "indexingFragments": {
    "text": {
      "value": {
        // this part sticks to the voyage API <https://docs.voyageai.com/reference/multimodal-embeddings-api>
        "content": [
          {
            "type": "text",
            "text": "A movie titled {{doc.title}} whose description starts with {{doc.overview|truncateWords:20}}."
          }
        ]
      }
    },
    // we also send the poster
    "poster": {
      "value": {
        "content": [
          {
            "type": "image_url",
            "image_url": "{{doc.poster}}"
          }
        ]
      }
    }
  },
  // describes how to search in the index
  "searchFragments": {
    // we allow sending a poster at search time
    "poster": {
      "value": {
        "content": [
          {
            "type": "image_url",
            "image_url": "{{media.poster}}"
          }
        ]
      }
    },
    // we also allow inline image data at search time only
    "image": {
      "value": {
        "content": [
          {
            "type": "image_base64",
            "image_base64": "data:{{media.image.mime}};base64,{{media.image.data}}"
          }
        ]
      }
    },
    "text": {
      "value": {
        "content": [
          {
            "type": "text",
            // uses the `q` field from search queries
            "text": "{{q}}"
          }
        ]
      }
    }
  },
  "request": {
    "inputs": [
      "{{fragment}}",
      "{{..}}"
    ],
    "model": "voyage-multimodal-3"
  },
  "response": {
    "data": [
      {
        "embedding": "{{embedding}}"
      },
      "{{..}}"
    ]
  }
}}

Then, to search by poster (image URL):

// POST /indexes/$INDEX_NAME/search
{
  "media": {
    "poster": "https://image.tmdb.org/t/p/w500/6FfCtAuVAW8XJjZ7eWeLibRLWTw.jpg"
  },
  "hybrid": {
    "embedder": "voyage",
    // semanticRatio is specified here for explicitness,
    // but it would default to 1.0 if omitted, as we don't have a text query
    // (no "q") here.
    "semanticRatio": 1.0
  }
}

To search by image data (encoded as base64):

// POST /indexes/$INDEX_NAME/search
{
  "media": {
    "image": {
      "mime": "image/jpeg",
      // image bytes encoded as base64
      "data": "/9j/4AAQSkZJRgABAQAAAQABAAD/2w..."
    }
  "hybrid": {
    "embedder": "voyage",
  }
}

To search by text (performing a hybrid search):

// POST /indexes/$INDEX_NAME/search
{
  // note that since the model is multimodal, this will also compare the produced embedding
  // with the poster images from movie, so describing a poster image here could find the
  // associated movie
  "q": "A movie with lightsabers in space",
  "hybrid": {
    "embedder": "voyage",
    "semanticRatio": 0.5
  }
}

For more information about this feature, please refer to its public usage page

Done by @dureuill in #5596

Export/Transfer documents between instances

Meilisearch now allows to transfer documents from an instance to another without having to create a dump or a snapshot. This feature will ease the migration to the Cloud by streaming all the documents from a local instance to a cloud one.

Usage

We expose one single route on the instance which accepts a bunch of parameters.

• url: Where do we want to send our settings and documents.
• apiKey: (optional) The API key to have the rights to send those requests. Usually the master key of the remote machine.
• payloadSize: (optional) A human readable size defining the size of the payloads to send. Defaults to 50 MiB.
• indexes: (optional) A set of patterns of matching the indexes you want to export. If not defined, defaults to all indexes without filter.
• filter: (optional) A filter defining the subset of documents to actually export.
• overrideSettings: (optional, default false) When false, will not set settings nor update the primary key on indexes that already exist on the remote instance. Will still send the documents

POST: /export

{
  "url": "https://localhost:7711",
  "apiKey": null,
  "payloadSize": "123 MiB",
  "indexes": {
    "*": {
      "filter": null,
      "overrideSettings": true
    }
  }
}

Response:

{
  "taskUid": 2,
  "indexUid": null,
  "status": "enqueued",
  "type": "export",
  "enqueuedAt": "2025-06-26T12:54:10.785864Z"
}

One task can retry requests in case of failure (not indefinitely, though) and can also be canceled. However, keep in mind that canceling this export task will not cancel tasks received by the targeted Meilisearch instance.

Done by @Kerollmops with the help of @Mubelotix in #5670

Other improvements

• Added support for nested wildcards in attributes_to_search_on by @lblack00 in #5548
• Improve the support of geo field extraction from the documents by @nnethercott in #5592
• Use all CPUs when importing dumps by @nnethercott in #5527
• Display the last embedder error live in batches by @Mubelotix in #5707
• Settings indexer edition 2024 by @ManyTheFish in #5687
• Request fragments by @dureuill in #5596

Fixes 🐞

• Improve the performance when managing single-typo words by @dureuill in #5551
• Fix distinct for hybrid search by @dureuill in #5614
• Fix a bug related to Cyrillic having different typo tolerance due to byte counting bug by @arthurgousset in #5617
• Fix Gemini base_url when used with OpenAI clients by @diksipav in #5692
• Remove Gemini from the LLM-providers list due to incompatibility with OpenAI by @Kerollmops in #5708
• Fix the environment variable name of the experimental limit batched tasks total size feature by @Kerollmops in #5705
• Fix disableOnNumbers reset by @Nymuxyzo in #5702
• Make sure to recover from missing update files by @Kerollmops in #5683
• Add analytics to the chat completions by @Kerollmops in #5709

Misc

• Dependencies updates
  • Remove old dependencies by @Mubelotix in #5689
  • Upgrade dependencies by @Kerollmops in #5686
  • Bump the mini-dashboard to v0.2.20 by @Kerollmops in #5728
• CIs and tests (34 PRs, one folk, yes!)
  • perf: Faster IT tests - stats.rs by @martin-g in #5572
  • perf: Faster index::get_index IT tests by @martin-g in #5578
  • tests: Assert succeeded/failed for the index::delete_index IT tests by @martin-g in #5580
  • tests: Faster index::search::mod IT tests by @martin-g in #5584
    ...

This patch release introduces a major fix and some minor fixes.

Major fix: searchable attributes database bug

Some searchable fields were removed from the searchable databases when they were removed from the filterableAttributes setting.
This made them unsearchable, although they were still precise in the searchableAttributes setting.

Fixed by @ManyTheFish in #5660

Minor fixes

• Fix chat route missing base URL and Mistral error handling by @Kerollmops in #5665
• Various fixes to embedding regeneration by @dureuill in #5668

Meilisearch v1.15.1 adds new experimental conversational features and enables LLM-driven chat features.

🧰 All official Meilisearch integrations (including SDKs, clients, and other tools) are compatible with this Meilisearch release. Integration deployment takes 4 to 48 hours after a new version becomes available.

Some SDKs might not include all new features. Please look over the project repository for detailed information. Is a feature you need missing from your chosen SDK? Create an issue letting us know you need it, or, for open-source karma points, open a PR implementing it (we'll love you for that ❤️).

Chat with your indexes

After enabling the experimental chat feature, you can create a chat workspace with the appropriate settings.
We have a guide on how to set up a good chat interface for your indexes.

curl -X POST 'https://localhost:7700/chats/my-assistant/settings' \
  -H 'Content-Type: application/json' \
  -d '{
    "source": "openAi",
    "apiKey": "sk-abc..."
  }'

Then by using the official OpenAI SDK you'll be able to chat with your indexes.

import OpenAI from 'openai';
const client = new OpenAI({
  baseURL: 'https://localhost:7700/chats/my-assistant',
  apiKey: 'YOUR_MEILISEARCH_CHAT_API_KEY',
});
const completion = await client.chat.completions.create({
  model: 'gpt-3.5-turbo',
  messages: [{ role: 'user', content: 'What is Meilisearch?' }],
  stream: true,
});
for await (const chunk of completion) {
  console.log(chunk.choices[0]?.delta?.content || '');
}

Done by @Kerollmops in #5556.

Meilisearch v1.15 adds a new typo tolerance setting, allowing you to disable typo tolerance for numbers. It also enables comparison operators for string filters.

🧰 All official Meilisearch integrations (including SDKs, clients, and other tools) are compatible with this Meilisearch release. Integration deployment takes 4 to 48 hours after a new version becomes available.

Some SDKs might not include all new features. Please look over the project repository for detailed information. Is a feature you need missing from your chosen SDK? Create an issue letting us know you need it, or, for open-source karma points, open a PR implementing it (we'll love you for that ❤️).

New features and updates 🔥

Disable typo tolerance for numbers

Set typoTolerance.disableOnNumbers to true to disable typo tolerance for numbers:

curl -X POST 'https://localhost:7700/indexes/movies/settings' \
  -H 'Content-Type: application/json' \
  -d '{
    "typoTolerance": {"disableOnNumbers": true}
  }'

Deactivating the typo tolerance on numbers can be helpful when trying to reduce false positives, such as a query term 2024 returning results that include 2025 and 2004. It may also improve indexing performance.

Done by @ManyTheFish in #5494.

Lexicographic string filters

This release allows you to filter strings lexicographically by enabling comparison operators (<, <=, >, >=, TO) on string values:

curl -X POST 'https://localhost:7700/indexes/movies/search' \
  -H 'Content-Type: application/json' \
  -d '{
    "filter": "release_date >= '2024-06'"
  }'

This new feature can be particularly useful when filtering human-readable dates.

Done by @dureuill in #5535.

Other improvements

• Allows cancelling an upgrade to a new Meilisearch version by rolling back all upgraded indexes by @dureuill in #5523
• Support EC private key as SSL certificate by @HDT3213 in #5471
• When passing the relevant CLI option, stop compacting snapshots, to speed up their generation by @dureuill and @irevoire in #5498 and #5560
• Add new batchStrategy field in the batches stats by @dureuill in #5488, #5530, and #5588
• Add log field tracking time spent searching in the vector store by @Kerollmops in #5525
• Improve filterable error messages by @CodeMan62 in #5425
• Improve error messages on embeddings dimension mismatch by @vuthanhtung2412 in #5449
• Update /network URL validation error message format by @CodeMan62 in #5486
• Expose the task queue's status size in the Prometheus metrics by @DanasFi in #5512

Fixes 🐞

• Fix _matchesPosition length calculation to improve client-side cropping by @shaokeyibb in #5446
• Fix _geo ranking rule by @HDT3213 in #5487
• Fix a panic in the search that could happen when looking for typos with a search prefix having more than 65k possible hits in the DB by @dureuill in #5564
• Make sure that passing MEILI_EXPERIMENTAL_MAX_NUMBER_OF_BATCHED_TASKS to 0 results in Meilisearch never processing any kind of task. By @irevoire in #5565
• Forbid value 0 for maxTotalHits in the index settings by @irevoire in #5566
• No longer reject documentTemplates that use array filters on documents (e.g. join) by @dureuill in #5593

Misc

• Dependency updates
  • Update Rust to 1.85.1 by @Kerollmops in #5480
  • Update charabia v0.9.3 by @ManyTheFish in #5466
  • Update the Prometheus to fix a security vulnerability by @Kerollmops in #5513
• CIs and tests
  • Setup the Milestone CI to update the Ruleset by @Kerollmops in #5444
  • Make the CI work with GitHub's merge queue grouping by @Kerollmops in #5445
  • Remove Bors references from the repository by @Kerollmops in #5447
  • Split unit tests for tasks by @shu-kitamura in #5424
• Misc
  • Improve dumpless upgrade compatibility by @irevoire in #5395
  • Fix links and formatting in README for clarity and consistency by @ZeroZ-lab in #5533

❤️ Thanks again to our external contributors:

• Meilisearch: @shu-kitamura, @shaokeyibb, @CodeMan62, @vuthanhtung2412, @HDT3213, @DanasFi, and @ZeroZ-lab.
• Charabia: @luflow, @mosuka, and @HDT3213.
• RoaringBitmap: @lucascool12 and @Dr-Emann.

• Minor fixes: Deactivate numbers in typos by @ManyTheFish in #5541
• Remove TemplateChecker by @dureuill in #5593
• Adapt tests to the Chinese word segmenter changes by @ManyTheFish in #5630
• update Charabia to the latest version by @ManyTheFish in #5630

Full Changelog: v1.15.0-rc.3...v1.15.0-rc.4

• Only intern in case of typo when looking for one or two typoes by @CodeMan62 in #5573
• Update charabia v0.9.5 by @ManyTheFish in #5557
• Rename batch creation complete by @dureuill in #5588
• Fix another derivation-related panic in the search by @dureuill in #5587

Full Changelog: v1.15.0-rc.2...v1.15.0-rc.3

This release fixes a docker deployment issue (by @dureuill in #5577) but is otherwise identical to RC 1