# BAAI FlagEmbedding vs sentence-transformers

| Attribute | BAAI FlagEmbedding | sentence-transformers |
|---|---|---|
| **Vioscale score** | 58.6 (27% (low)) | 56 (32% (low)) |
| activity.commits_last_30d | 13 | 100 |
| adoption.dependent_repos | 1 | 5,182 |
| adoption.github_stars | 12,086 | 19,036 |
| deployment.options | `{"cloud":true,"on_prem":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A library of state-of-the-art embedding models supporting dense, lexical, and cross-encoder retrieval methods for text and image search, available as free and open-source software. | Python toolkit for generating semantic embeddings from text, images, audio, and video using transformer-based neural networks. Supports dense embedding models, cross-encoder rerankers for scoring and ranking, and late-interaction multi-vector models for advanced retrieval tasks. |
| features.capabilities | `{"pricing_model":"free_open_weights","architecture_model":"open_weights_local","cross_encoder_reranker_api_offered":true,"mit_or_apache_permissive_oss_license":true,"late_interaction_architecture_colbert_v2":true,"multi_modal_image_and_text_joint_embeddings":true,"massive_context_window_greater_than_8k_tokens":true,"multilingual_support_across_100_plus_languages":true}` | `{"pricing_model":"free_open_weights","architecture_model":"open_weights_local","cross_encoder_reranker_api_offered":true,"late_interaction_architecture_colbert_v2":true,"multi_modal_image_and_text_joint_embeddings":true}` |
| integrations.count | - | 1 |
| integrations.list | - | `[{"name":"Hugging Face Hub"}]` |
| language.primary | Python | Python |
| license.spdx | MIT | Apache-2.0 |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | - |
| pricing | `{"type":"open_source","summary":"Free and open source under MIT license","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-21T11:06:33.625Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://www.sbert.net","retrievedAt":"2026-08-21T11:02:44.703Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 104 | 27 |
| release.history | `[{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/v1.4.2","date":"2026-08-24T02:55:16Z","type":"stable","version":"v1.4.2"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/v1.4.1","date":"2026-08-23T12:48:07Z","type":"stable","version":"v1.4.1"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/v1.4.0","date":"2026-04-22T15:59:10Z","type":"stable","version":"v1.4.0"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/v1.3.5","date":"2025-05-28T07:14:20Z","type":"stable","version":"v1.3.5"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/v1.3.4","date":"2025-02-07T14:14:41Z","type":"stable","version":"v1.3.4"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/v1.3.2-BGE-Update","date":"2024-10-31T16:23:48Z","type":"stable","version":"v1.3.2-BGE-Update"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/BGE-M3%26Beacon","date":"2024-02-02T05:57:07Z","type":"stable","version":"BGE-M3&Beacon"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/lm-cocktail","date":"2023-11-24T09:22:50Z","type":"stable","version":"lm-cocktail"},{"url":"https://github.com/FlagOpen/FlagEmbedding/releases/tag/1.1","date":"2023-09-28T07:43:03Z","type":"stable","version":"1.1"}]` | `[{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v6.0.0","date":"2026-08-18T13:46:07Z","type":"stable","version":"v6.0.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.7.0","date":"2026-08-06T12:12:42Z","type":"stable","version":"v5.7.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.6.1","date":"2026-07-23T14:42:08Z","type":"stable","version":"v5.6.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.6.0","date":"2026-06-16T14:02:15Z","type":"stable","version":"v5.6.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.5.1","date":"2026-05-20T07:37:38Z","type":"stable","version":"v5.5.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.5.0","date":"2026-05-12T14:06:38Z","type":"stable","version":"v5.5.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.4.1","date":"2026-04-14T13:35:25Z","type":"stable","version":"v5.4.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.4.0","date":"2026-04-09T13:41:49Z","type":"stable","version":"v5.4.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.3.0","date":"2026-03-12T14:54:11Z","type":"stable","version":"v5.3.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.3","date":"2026-02-17T14:06:18Z","type":"stable","version":"v5.2.3"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.2","date":"2026-01-27T11:11:19Z","type":"stable","version":"v5.2.2"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.1","date":"2026-01-26T14:48:31Z","type":"stable","version":"v5.2.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.2.0","date":"2025-12-11T14:12:37Z","type":"stable","version":"v5.2.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.1.2","date":"2025-10-22T13:00:25Z","type":"stable","version":"v5.1.2"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.1.1","date":"2025-09-22T11:28:54Z","type":"stable","version":"v5.1.1"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.1.0","date":"2025-08-06T13:49:08Z","type":"stable","version":"v5.1.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v5.0.0","date":"2025-07-01T13:56:10Z","type":"stable","version":"v5.0.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v4.1.0","date":"2025-04-15T13:47:13Z","type":"stable","version":"v4.1.0"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v4.0.2","date":"2025-04-03T11:29:10Z","type":"stable","version":"v4.0.2"},{"url":"https://github.com/huggingface/sentence-transformers/releases/tag/v4.0.1","date":"2025-03-26T14:59:03Z","type":"stable","version":"v4.0.1"}]` |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=flagembedding&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=sentence-transformers&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Embeddings Apis)

| Capability | BAAI FlagEmbedding | sentence-transformers |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Architecture model | Open weights local | Open weights local |
| Matryoshka representation learning for dimension truncation | - | - |
| Multilingual support across 100 plus languages | ✓ | - |
| Binary and scalar quantization for memory reduction | - | - |
| Cross encoder reranker API offered | ✓ | ✓ |
| Late interaction architecture colbert v2 | ✓ | ✓ |
| Massive context window greater than 8k tokens | ✓ | - |
| Multi modal image and text joint embeddings | ✓ | ✓ |
| Task specific prefixes query vs document instructions | - | - |
| Zero data retention training opt out enterprise | - | - |
| SOC2 type ii | - | - |
| Mit or apache permissive oss license | ✓ | - |
| Pricing model | Free open weights | Free open weights |

*Source: Vioscale. Generated 2026-09-01T14:40:37.145Z. "-" = undocumented, not absent.*