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How Much VRAM Do You Need to Serve an LLM? A 2026 Sizing Guide
The weights are the easy part — the math you can do on a napkin. What silently OOMs your server in production is the KV cache, and almost nobody budgets for it.
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The weights are the easy part — the math you can do on a napkin. What silently OOMs your server in production is the KV cache, and almost nobody budgets for it.
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The three formats aren't competing for the same job — one buys you faster math, one buys you smaller weights, and one is the fallback for hardware that can't do the first. Know which bottleneck you're paying down.
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When retrieval underperforms, everyone reaches to fine-tune the LLM. The cheaper, higher-leverage move is to fine-tune the embedding model — and almost all the gain comes from one ingredient.
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MCP standardized how an agent calls a tool. It said almost nothing about how the agent logs in as you — and that gap is the whole product these three are selling.
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The real divide in open-source RAG isn't which library to import — it's whether to build with one at all, or deploy a finished engine. Three engines, three very different bets.
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The architecture decision underneath every agent framework is one most teams skip — and the math of compounding errors says the boring choice is usually right.
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The embedding model you pick barely moves your bill. The dimensions you store and the precision you keep — that's the recurring cost, and it's the decision almost nobody makes on purpose.
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GRPO is now a commodity all three ship. The thing that actually sorts them is who owns the distributed orchestration — and how you keep one starving inference engine fed.
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Three ways to serve embeddings at scale that look like rivals but answer a different question: should embeddings be a dedicated specialist, or ride on the GPU already running your LLM?
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They look like a difficulty ladder. They're three orthogonal axes — and only one of them measures the thing that decides whether your agent survives contact with real users.
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The new realtime models hear and speak in one step, no text in the middle. That deletes the seam where you used to read, log, and control everything. Here's the real trade.
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The frameworks that get the most attention disagree on something basic — what an agent's action even is. One writes code, one wires a graph, one casts a team.
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A frontier model on every node is the default, not the optimum. Most agent calls are narrow, repetitive, and format-constrained — exactly the shape a small model was built for.
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The listicle treats these as three flavors of the same choice. They aren't — two are ends of one axis, and the third sits on a different axis entirely. Pick by your environment, not your vibe.
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The benchmark you compare on today expires in three weeks. The license you build on doesn't. Pick an open-weight family the way it will still matter next quarter — by what you're allowed to do with it, and what it costs to serve.
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Forcing a model to emit valid JSON is a solved problem. Doing it without slowing generation to a crawl is the one that produced three new engines — and your serving stack probably already picked one for you.
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Three self-hosted chat UIs that look interchangeable on a feature checklist — but each one is really built for a different person, and picking the wrong one means fighting the grain forever.
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An MoE model computes like a small model and remembers like a giant one. That split is great for a token factory and a trap for a single self-hosted agent.
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One agent, twenty MCP servers, and a context window drowning in tool definitions. The gateway is the layer that puts a single governed door in front of all of them.
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The three ways to align a model on preference data aren't a quality ladder — they're a pipeline being dismantled one component at a time. The thing each method removes tells you what it costs.
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Three open tools for making synthetic fine-tuning data. The model that generates it stopped being the hard part — the part that decides whether your dataset helps or quietly poisons your model is what happens after.
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The four tools map to four architectural postures — and in a year when the companies keep getting acquired out from under their users, the posture is what you're actually choosing.
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Two ways to build an agent that drives software: send it screenshots and let it move the cursor, or hand it the page's structure and let it act on elements. The split isn't old vs new — it's general vs reliable.
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Three repos for retrieving over PDFs as images instead of parsed text — and why the real choice between them is who owns the multi-vector storage problem, not who has the best model.
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Dense, sparse, and late-interaction retrieval aren't a quality ladder. They're three answers to one question — where does the matching cost live — and the answer decides your storage bill.
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They get pitched as competitors. They're not even the same kind of thing — and the difference that actually decides your architecture is what each one costs you in tokens.
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For a voice agent, the number that decides the experience isn't audio quality or even the vendor's model latency. It's production time-to-first-audio — and the gap between the two is where the choice actually lives.
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Your agent's automation framework drives the browser. This layer decides where that browser actually runs — and whether the sites it visits let it in.
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Three ways to compress embeddings for cheaper, faster retrieval — and the two-tier trick that turns a 32x memory cut into a 4% accuracy cost instead of a wipeout.
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Three protocols want to let your agent spend money. They aren't three answers to one question — they answer three different ones, and they stack.
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