Sold by: Cohere
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Rerank will return a sorted list of documents based on the semantic similarity between the query and documents.
3.9
Overview
Cohere's Rerank endpoint enables you to significantly improve search quality by augmenting traditional key-word based search systems with a semantic-based reranking system which can contextualize the meaning of a user's query beyond keyword relevance. Cohere's Rerank delivers much higher quality results than just embedding-based search, and it requires only adding a single line of code into your application.
Highlights
- Cohere's Rerank endpoint can be applied to both keyword-based search systems and vector search systems. When using a keyword-based search engine, like Elasticsearch or OpenSearch, the Rerank endpoint can be added to the end of an existing search workflow and will allow users to incorporate semantic relevance into their keyword search system without changing their existing infrastructure. This is an easy and low-complexity method of improving search results by introducing semantic search technology into a user’s stack.
- This endpoint is powered by our large language model that computes a score for the relevance of the query with each of the initial search results. Compared to embedding-based semantic search, it yields better search results — especially for complex and domain-specific queries.
- Semantic Search, Ranking, Reranking, Text Embeddings
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Dimension | Description | Cost/host/hour |
|---|---|---|
ml.g5.2xlarge Inference (Batch) Recommended | Model inference on the ml.g5.2xlarge instance type, batch mode | $6.16 |
ml.g5.xlarge Inference (Real-Time) Recommended | Model inference on the ml.g5.xlarge instance type, real-time mode | $5.71 |
ml.g4dn.12xlarge Inference (Batch) | Model inference on the ml.g4dn.12xlarge instance type, batch mode | $19.80 |
ml.g4dn.2xlarge Inference (Batch) | Model inference on the ml.g4dn.2xlarge instance type, batch mode | $3.81 |
ml.p3.2xlarge Inference (Real-Time) | Model inference on the ml.p3.2xlarge instance type, real-time mode | $15.49 |
ml.g5.2xlarge Inference (Real-Time) | Model inference on the ml.g5.2xlarge instance type, real-time mode | $6.16 |
ml.g4dn.xlarge Inference (Real-Time) | Model inference on the ml.g4dn.xlarge instance type, real-time mode | $2.98 |
ml.g4dn.2xlarge Inference (Real-Time) | Model inference on the ml.g4dn.2xlarge instance type, real-time mode | $3.81 |
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Delivery details
Amazon SageMaker model
An Amazon SageMaker model package is a pre-trained machine learning model ready to use without additional training. Use the model package to create a model on Amazon SageMaker for real-time inference or batch processing. Amazon SageMaker is a fully managed platform for building, training, and deploying machine learning models at scale.
Deploy the model on Amazon SageMaker AI using the following options:
Version release notes
Among many bug fixes and improvements the latest release includes the following features: Chunked Context:
- Enabled chunked context for all models. Chunked context allows for batch processing between the context and the generation phases, thereby balancing the computational and memory cost of each phase and increasing throughput.
Additional details
Inputs
- Summary
The model accepts JSON requests that specifies the input texts to be reranked.
{ "documents": [ {"text":"Carson City is the capital city of the American state of Nevada. "}, {"text" : "The Commonwealth of the Northern Mariana Islands is a group of islands in the Pacific Ocean."}, {"text" : "Washington, D.C. is the capital of the United States. "}, ], "query": "What is the capital of the United States?", "top_n": 2, "return_documents": true }
- Input MIME type
- application/json
https://github.com/cohere-ai/cohere-aws/blob/main/examples/rerank_v2_samples/rerank_english_v2_input.json
https://github.com/cohere-ai/cohere-aws/blob/main/examples/rerank_v2_samples/rerank_english_v2_input.json
Input data descriptions
The following table describes supported input data fields for real-time inference and batch transform.
Field name | Description | Constraints | Required |
|---|---|---|---|
query | The search query. | Type: FreeText | Yes |
documents | A list of document objects or strings to rerank - if a document is provided the text fields is required and all other fields will be preserved in the response | Type: FreeText
Limitations: List of text. | Yes |
top_n | The number of most relevant documents or indices to return, defaults to the length of the documents | Default value: len(documents)
Type: Integer
Minimum: 1 | No |
return_documents | If false returns results without the doc text - the api will return a list of {index, relevance score} where index is inferred from the list passed into the request.
If true returns results with the doc text passed in - the api will return an ordered list of {index, text, relevance score} where index + text refers to the list passed into the request | Default value: false
Type: Categorical
Allowed values: true,false | No |
max_chunks_per_doc | The maximum number of chunks to produce internally from a document | Default value: 10
Type: Integer
Minimum: 0 | No |
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Contact us at support+aws@cohere.com
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Rerank will return a sorted list of documents based on the semantic similarity between the query and documents.
Customer reviews
Diganth Sanghvi
Improved document chatbot has delivered accurate answers and builds stronger client trust
Reviewed on Mar 27, 2026
Review from a verified AWS customer
What is our primary use case?
My main use case for Cohere is that it's a good embedding model. I have used it with Titan, but Cohere came out better.
A specific example of how I've used Cohere for embeddings is when I was working with one of our clients where we were establishing a chatbot that can help us go through 31 PDFs. For embedding, we used Cohere and Titan, and Cohere was a superior product.
I have integrated Cohere in that chatbot project using SageMaker , and it was an easy API call that I used.
What is most valuable?
In my opinion, the best features Cohere offers are the embedding flexibility and the normal way the LLM reacted to the embeddings of Cohere. I used OpenSearch to integrate and store all the embeddings, and I used Titan as well to store the embeddings in OpenSearch , but the result was much better.
The flexibility I mentioned is evident because when we were using Titan, it was hallucinating a lot and not giving proper answers because I felt the embedding was poor. When we used it with Cohere, the embeddings were better and the chatbot with the LLM that used the embeddings from Cohere answered in a better way.
Cohere has positively impacted my organization as the project was a success. Clients were really happy with the results, and we received more business from them.
What needs improvement?
Cohere can be improved by having more integrations beyond its current offerings with Amazon. Integrations with Databricks , Azure , and Google Cloud would be beneficial.
For how long have I used the solution?
I have been using Cohere for the last two years.
What do I think about the stability of the solution?
Cohere is stable.
What do I think about the scalability of the solution?
Cohere's scalability is pretty good, as we used it for 31 PDFs and there was no bottleneck.
Cohere handles large-scale data and workloads really well. I did not see any bottleneck at all because the project was relatively small.
How are customer service and support?
We did not require any customer support.
Which solution did I use previously and why did I switch?
I did not previously use a different solution; this was the first time we were developing it and Cohere was from the start a competitive alternative to Titan, so we were always going to choose between Cohere or Titan.
How was the initial setup?
It was extremely easy for my team to learn and start using Cohere; it was just one API call.
What about the implementation team?
Cohere integrates really well with the tools I use, and I did not experience any challenges with OpenSearch or SageMaker .
What was our ROI?
Regarding the return on investment and any relevant metrics such as money or time saved or reduced resource needs, that is confidential.
What's my experience with pricing, setup cost, and licensing?
Which other solutions did I evaluate?
Before choosing Cohere, I evaluated AWS Titan.
The key factors that led me to choose Cohere over other AI development platforms are that I was experimenting, and Cohere was better than Titan.
What other advice do I have?
Cohere has helped my organization innovate and stay ahead in our industry as Cohere was better than Titan, and it helped us to secure the client's confidence and we moved from proof of concept to production.
The advice I would give to others looking into using Cohere is to go for it. Cohere is the best embedding model, and I would not recommend wasting time with AWS Titan.
I rate Cohere a 10 out of 10 because Cohere was way better compared to Titan.
reviewer2802159
Summarization and chat completion have improved workflows but still need built-in OCR support
Reviewed on Feb 11, 2026
Review from a verified AWS customer
What is our primary use case?
I work with Cohere and have been doing so for about two months.
Currently, I am working with AWS Cloud and cloud services, and we use models like GPT-4o mini, 2.1, and Cohere.
We primarily use English only, with no other languages.
What is most valuable?
I assess the value of Cohere's API support in my business operations as easy to integrate.
The specific benefits I have seen from using Cohere include saving time to summarize information and for chat completion and related tasks.
I use Cohere for chat completion purposes.
My thoughts on the summarization feature are that it is beneficial for impacting our data analysis tasks.
What needs improvement?
English is where the language understanding was specifically beneficial for us.
Cohere is a solid LLM that processes all files well.
I would appreciate additional features such as OCR and similar capabilities.
For how long have I used the solution?
I have been working with Cohere for about two months.
What do I think about the stability of the solution?
There are no disadvantages or drawbacks of Cohere in comparison to ChatGPT or other AI solutions.
What do I think about the scalability of the solution?
There are no complexities with Cohere; the setup process is straightforward.
How are customer service and support?
I have not escalated any questions to the technical support team.
How would you rate customer service and support?
Negative
Which solution did I use previously and why did I switch?
I have experience working with several different AI products, but I do not perceive any significant difference between them; they are nearly identical with accuracy varying slightly across certain areas.
How was the initial setup?
There are no complexities; the setup process is straightforward.
What was our ROI?
I have not observed any measurable benefits or return on investment with Cohere.
What's my experience with pricing, setup cost, and licensing?
In my opinion, the pricing is reasonable.
Which other solutions did I evaluate?
There are no key differences or notable advantages or disadvantages of Cohere in comparison to other AI tools and LLM products that I am working with.
What other advice do I have?
I intended to clarify that I use Cohere for chat completion.
My primary concern stems from the missing OCR capabilities.
My overall review rating for Cohere is seven out of ten.
Which deployment model are you using for this solution?
Public Cloud
If public cloud, private cloud, or hybrid cloud, which cloud provider do you use?
Amazon Web Services (AWS)
Shivam Singh
Controlled text generation has supported secure workflows and governed data privacy
Reviewed on Dec 12, 2025
Review from a verified AWS customer
What is our primary use case?
We adopted Cohere primarily for their command model to support enterprise-grade text generation and NLP workflows.
There was a use case for one of our customers where they required automated text generation and summarization of long documents and draft creation for internal content, so we used Cohere's command model with AWS Bedrock.
For another customer, there was a similar use case but they also wanted semantic search and RAG, and instruction-based responses for chat and workflow automation were required, so we used Cohere's command model for that.
What is most valuable?
Cohere's command model is particularly useful for scenarios where consistent controlled output is more important, especially where we need creative responses, so I think Cohere's command model fits better in that case. We also found it well suited for structured enterprise tasks such as policy drafting, knowledge extraction, and generating standardized text for operational workflows.
It struck a good balance between fluency and predictability, which helps our team and is valuable for our business-critical applications, giving better insight to our team.
One of the major benefits I saw was data isolation and governance since Cohere has been implemented.
Consistent output quality, strong instruction following, and excellent embedding performance for retrieval tasks have benefited our organization. It was also offered from Amazon Bedrock , so this complete offering and strength from Cohere's command model helped our customers, and it is enterprise-friendly with deployment options such as VPC and data isolation that helped significantly.
Data privacy was a major concern because we operate from Asia-Pacific, and there is strong governance for data privacy in our country, so data privacy is the major compliance that helped us here.
What needs improvement?
Cohere could improve in areas where the command model is not as creative as some larger LLMs available in the market, which is expected but noticeable in open-ended generative tasks.
Reporting and analytics in the dashboard could be more detailed and fine-tuned, which would enhance the experience.
Fine-tuning could be simplified to support broader teams without deep ML expertise.
For speeding up, what I have already suggested is that it can be more creative, and their reporting and analytics can be improved, as this would help teams without machine learning expertise and speed up their end goals.
The dashboard reporting can be improved.
For how long have I used the solution?
We have been using Cohere for around one year.
What do I think about the stability of the solution?
Cohere is stable.
What do I think about the scalability of the solution?
The scalability and performance are quite good.
How are customer service and support?
We have not reached out to customer support yet, but once we encounter an issue and need to raise a ticket, we will provide feedback.
What was our ROI?
Cohere helped us with all three aspects: money is saved, time is saved, and we needed fewer resources to meet our end goals.
What's my experience with pricing, setup cost, and licensing?
Compared to models available in the market, Cohere's pricing, setup cost, and licensing are better.
Which other solutions did I evaluate?
We have tried multiple models, but we found that Cohere's command was a better fit for our needs.
We explored models from Anthropic and AWS native models such as AWS Titan Text before choosing Cohere.
What other advice do I have?
Data privacy was a major concern because we operate from Asia-Pacific, and there is strong governance for data privacy in our country, so data privacy is a major compliance that helped us here.
Cohere offers great customization options.
If governance, consistency, and data privacy are priorities, Cohere meets our organization's requirements well.
I recommend that anyone, especially in environments where governance, consistency, and data privacy are priorities, should choose Cohere, particularly the command model for teams looking for a controlled enterprise-safe alternative for text generation, summarization, and instruction automation.
Currently, we have used Cohere from the AWS Bedrock offering only, but since AWS has changed their third-party model availability from partner accounts, in the future, we are going to be a reseller for Cohere.
The documentation and learning resources were very helpful.
Our overall review rating for Cohere is 8 out of 10.
Which deployment model are you using for this solution?
Public Cloud
If public cloud, private cloud, or hybrid cloud, which cloud provider do you use?
Amazon Web Services (AWS)
reviewer2784894
Fast document processing has improved tender workflows but documentation still needs work
Reviewed on Dec 04, 2025
Review provided by PeerSpot
What is our primary use case?
My main use case for Cohere is for LLM and chatbot development.
I use Cohere to fill boxes about documents, specifically about tenders.
Cohere helps me fill boxes about documents, and I work with docx documents for a private company.
What is most valuable?
The best features Cohere offers are that it is fast and great.
Speed has helped me in my day-to-day work, and I really notice the difference because it responds very quickly to LLM requests.
Cohere has positively impacted my organization because I use it with Oracle, and in an enterprise way, it helped me offer clients a unique place to develop and use LLM. I can tell you that it helped me offer clients a unique place to develop and use LLM, as I use Oracle services.
What needs improvement?
I am uncertain about how Cohere can be improved.
The documentation and support could be improved, as there is limited documentation available on the web.
What do I think about the stability of the solution?
Cohere is stable.
What do I think about the scalability of the solution?
I am uncertain about Cohere's scalability.
How are customer service and support?
I am uncertain about customer support.
Which solution did I use previously and why did I switch?
I used GPT-4 before Cohere, and it is great.
Before choosing Cohere, I evaluated other options, specifically GPT-4.
What was our ROI?
I am uncertain if I have seen a return on investment or any relevant metrics such as time saved, money saved, or fewer employees needed.
What's my experience with pricing, setup cost, and licensing?
My experience with pricing, setup cost, and licensing is that it is expensive to use all Oracle services.
What other advice do I have?
I do not want to add anything else about the features, including anything about accuracy or ease of use.
I do not have specific advice to give to others looking into using Cohere. I gave this review a rating of 6.
reviewer2784744
Reranking has boosted retrieval quality and has improved performance in my information systems
Reviewed on Dec 04, 2025
Review from a verified AWS customer
What is our primary use case?
My main use case for Cohere is Retrieval Augmented Generation.
A specific example of how I use Retrieval Augmented Generation with Cohere is for information retrieval systems.
What is most valuable?
The best feature Cohere offers is the Reranking model.
What stands out for me about the ranking model is that it improved performance in my work.
Cohere positively impacted my organization by improving the performance of my RAG system.
I noticed a 10% improvement in my log system after using Cohere.
What needs improvement?
Cohere is good enough, and I think it can be improved.
For how long have I used the solution?
I have been using Cohere for two years.
What do I think about the stability of the solution?
Cohere is stable.
What do I think about the scalability of the solution?
The scalability of Cohere is good.
How are customer service and support?
The customer support for Cohere is good.
How would you rate customer service and support?
Negative
How was the initial setup?
My experience with pricing, setup cost, and licensing for Cohere is good.
What was our ROI?
I have not seen metrics for return on investment, and I have no metrics to share.
What's my experience with pricing, setup cost, and licensing?
My experience with pricing, setup cost, and licensing for Cohere is good.
What other advice do I have?
My advice to others looking into using Cohere is to try it.
My company does not have a business relationship with this vendor other than being a customer.
I gave this review a rating of 8.
Which deployment model are you using for this solution?
Public Cloud
If public cloud, private cloud, or hybrid cloud, which cloud provider do you use?
Amazon Web Services (AWS)