Ofer Mendelevitch Profile
Ofer Mendelevitch

@ofermend

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Following
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152
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Working with LLMs, RAG and Agents @ Vectara

California, USA
Joined December 2009
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@ofermend
Ofer Mendelevitch
1 month
Excited to share that I'm working on the upcoming "Hands-on RAG in production" with @forrestbao. The early release is here:.
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@ofermend
Ofer Mendelevitch
12 minutes
Love this chart from @OpenAI. I was lucky enough to get started at gpt-2, and so happy to see this amazing progression.
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@ofermend
Ofer Mendelevitch
16 minutes
Like many others I'm sure - excited to be testing GPT-5 today/tmrw and over the weekend. Super exciting. .
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@ofermend
Ofer Mendelevitch
2 hours
vectara-agentic 0.4.1 just released today. Includes support for @OpenAI gpt-oss-20B via @togethercompute .
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github.com
A python library for creating AI assistants with Vectara, using Agentic RAG - vectara/py-vectara-agentic
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@ofermend
Ofer Mendelevitch
1 day
Our Hallucination Evaluation model (HHEM) just crossed 5M downloads on @huggingface. So exciting to see how popular this is and the value it adds to the RAG and Agentic community. model: Leaderboard: .HHEM API endpoint in Vectara:.
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github.com
Leaderboard Comparing LLM Performance at Producing Hallucinations when Summarizing Short Documents - vectara/hallucination-leaderboard
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@ofermend
Ofer Mendelevitch
2 days
I consider myself fortunate to have had the opportunity to use gpt-2 back when it was released, and learn so much then about LLMs.So glad to see @OpenAI back in the open source game.
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@ofermend
Ofer Mendelevitch
6 days
One of the main hurdles for success with Agentic AI is trust. We need to put in place mechanisms so that agents can be trusted by humans. Human-in-the-loop is often a good first step (trust and verify), but to truly scale we need fully trusted AI agents.
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@ofermend
Ofer Mendelevitch
6 days
As humans we trust each other all the time. For example, when you cross the road, you trust all the cars standing in the redlight to not run you over. Or when you buy groceries, you trust others to make sure non of it is poisonous or will make you sick.
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@ofermend
Ofer Mendelevitch
12 days
RT @TheTuringPost: The truth about RAG. @awadallah, CEO of @Vectara, founder of @Cloudera, ex-VP at Yahoo & Google, breaks down what’s real….
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@ofermend
Ofer Mendelevitch
13 days
Google Gemini-2.5-flash-lite is awesome.It also scores 2.9% (pretty low for such a fast model) on @vectara Hallucination Leaderboard:.
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github.com
Leaderboard Comparing LLM Performance at Producing Hallucinations when Summarizing Short Documents - vectara/hallucination-leaderboard
@googleaidevs
Google AI Developers
16 days
🔔 Gemini 2.5 Flash-Lite is now stable and generally available. This model offers the lowest latency and cost in the Gemini 2.5 family, making it our fastest and most cost-efficient option for developers building production-ready AI applications.
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@ofermend
Ofer Mendelevitch
14 days
ICYMI: Enterprise Deep Research is just like web-based deep research, but pointed at your private data. A lot of use-cases here: from compliance monitoring, document generation, RFP filling, and many others. Check out our recent blog posts:.
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vectara.com
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@ofermend
Ofer Mendelevitch
14 days
We need to MCPify the web. Agents browser use is bridging the gap, but it's slow and inefficient. It was built for humans, not for AI. Agents needs an efficient and accurate way to use websites. This will take a while though. .
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@ofermend
Ofer Mendelevitch
14 days
RT @AndrewYNg: Announcing our new event - Buildathon: The Rapid Engineering Competition. See the video for details, and please apply to par….
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@ofermend
Ofer Mendelevitch
15 days
RT @vectara: RFP responses are getting harder — but AI can make them faster and smarter. In our latest blog, we explore how enterprises can….
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@ofermend
Ofer Mendelevitch
16 days
RT @ofermend: For the last 2 decades, the mental load on our brains has grown dramatically. From emails, slack messages, and the endless sc….
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@ofermend
Ofer Mendelevitch
16 days
RT @TEDAISF: 🔊 We’re thrilled to welcome @vectara as a sponsor of @TEDAISF 2025. Thank you for supporting this year’s edition. ✨ . #TEDAISF….
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@ofermend
Ofer Mendelevitch
16 days
The concept of "Trusted AI" takes on a bigger meaning in this case: we want AI agents we can trust not only to give us accurate responses but also "respect" our boundaries without losing their value to us. #RespectfulAI.
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@ofermend
Ofer Mendelevitch
16 days
So yes the risk is that the attention required of us is multiplying yet again. We've gone from managing human conversations to managing both human and machine conversations. And the number of machines can grow overnight to an unmanageable size.
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@ofermend
Ofer Mendelevitch
16 days
And now AI agents are coming. Suddenly, we have new digital "colleagues" and "friends" to manage and interact with: they will send us all kind of notifications, and would need our feedback, guidance and direction.
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@ofermend
Ofer Mendelevitch
16 days
For the last 2 decades, the mental load on our brains has grown dramatically. From emails, slack messages, and the endless scroll of social media - this need to be "always on" has been detrimental to our mental well being.
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@ofermend
Ofer Mendelevitch
16 days
If you ever responded to RFPs at your company, you are going to love this: Enterprise Deep Research for RFPs.
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vectara.com
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