Embed v4.0
Embed v4.0 is a multimodal embedding model from Cohere that converts text, images, or mixed content into vector representations for classification and semantic search.
import { embed } from 'ai';
const result = await embed({ model: 'cohere/embed-v4.0', value: 'Sunny day at the beach',})Providers
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More models by Cohere
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| 32K | $2/K | — |  | 12/11/2025 | ||||||||
| 32K | $2.50/K | — | | 12/11/2025 | ||||||||
| 256K | 0.2s | 76tps | $2.50/M | $10/M | — | | 03/13/2025 | |||||
| 4K | $2/K | — |  | 12/02/2024 |
About Embed v4.0
Embed v4.0 is Cohere's fourth-generation embedding model, released April 15, 2025. It reaches a 65.2 MTEB score, ahead of OpenAI's text-embedding-3-large (64.6). Beyond text-only retrieval, it embeds interleaved text and images in the same vector space. You can index screenshots of PDFs, slides, figures, and tables directly alongside text documents without converting visual content to text first. That removes a common preprocessing step in document-heavy RAG pipelines.
The architecture supports four output dimensions: 256, 512, 1,024, and 1,536. It also supports Matryoshka-style nested representations, so you can truncate a full-resolution embedding to a smaller size with limited quality loss. You can tune the cost-versus-accuracy tradeoff at query time or build tiered retrieval systems. Use compressed vectors for lightweight candidate retrieval and full-resolution embeddings for re-ranking. The default dimension is 1,536.
Cohere describes the model as helping organizations "securely retrieve their multimodal data to build agentic AI applications." Its multimodal input coverage (text, images, and interleaved combinations) fits knowledge bases with mixed-format assets: technical documentation with embedded diagrams, investor presentations, and research reports with figures. You don't need separate embedding models per content type.
Embedding input is billed at $0.12 per million tokens at listed AI Gateway rates. See https://docs.cohere.com/docs/cohere-embed for request formats and limits.
What To Consider When Choosing a Provider
- Configuration: Before you index large document corpora, confirm your vector database supports the embedding dimension you select. Embed v4.0 offers four output sizes: 256, 512, 1,024, or 1,536.
- Zero Data Retention: AI Gateway supports Zero Data Retention for this model via direct gateway requests (BYOK is not included). To configure this, check the documentation.
- Authentication: AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.
When to Use Embed v4.0
Best for
- Mixed-format RAG: PDFs with charts, slide decks, and tables share a unified embedding space without separate OCR or image description pipelines
- Multimodal semantic search: Image queries match text results and text queries surface image-based content
- Storage-sensitive indexes: Matryoshka truncation reduces dimensions (for example, 1,536 to 256) with a controlled accuracy tradeoff
- Multilingual retrieval: Cross-lingual similarity matching works within a single index
- Agentic search systems: One embedding endpoint covers diverse document types like reports, spreadsheets, and slides
Consider alternatives when
- Plain text only corpus: A text-only embedding model would simplify integration with no visual content
- Maximum throughput priority: A smaller or quantized model meets cost targets at lower accuracy
- Unsupported dimensions: Your vector database requires embedding dimensions outside the four sizes (256, 512, 1,024, 1,536) that Embed v4.0 supports
Conclusion
Embed v4.0 brings text and visual content into a shared embedding space for enterprise retrieval. Its 65.2 MTEB score and configurable Matryoshka dimensions give you one model that balances retrieval accuracy with storage and latency constraints across diverse knowledge bases. Route it through AI Gateway with model id cohere/embed-v4.0.