vLLM · 8 min read

vLLM vs Ollama in production: the 2026 benchmark (single user, batching, multi-user)

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Damien · LocalIA
Published 2026-05-12

Real benchmark of the two inference runtimes on RTX 5090 and 2x RTX 5090 NVLink. Single user, 4 concurrent users, 10 users under load: who wins when, and why continuous batching changes everything.

LocalIA AI rig

You have your AI rig, your quantized model, but what serves the inference? In 2026, two runtimes dominate: Ollama for simplicity and vLLM for production. We benched both on the same machines — here are the numbers and the final recommendation.

The 1-paragraph verdict

Ollama if you are alone or 2-3 people and want to install/test a model in 5 minutes. vLLM if you serve more than 3 concurrent users, every token matters, and you can invest 2-3h of setup. No match — they answer two different problems.

Single user, short prompt

Llama 3.3 70B Q4 · 2× RTX 5090Ollama 28 tok/s · vLLM 32 tok/svLLM +14%
Qwen 3 30B MoE · 1× RTX 5090Ollama 44 tok/s · vLLM 48 tok/svLLM +9%
Llama 3.3 70B Q4 · 1× RTX 5090 (offload)Ollama 9 tok/s · vLLM 11 tok/svLLM +22%

4 concurrent users — the moment of truth

Llama 3.3 70B Q4 · 2× RTX 5090Ollama 30 tok/s cumulativevLLM 98 tok/s cumulative · ×3.3
Qwen 3 30B MoE · 1× RTX 5090Ollama 46 tok/s cumulativevLLM 156 tok/s cumulative · ×3.4

10 concurrent users — production case

Llama 3.3 70B Q4 · 2× RTX 5090Ollama 47s P95 latencyvLLM 8s P95 · ×6 faster
Qwen 3 30B MoE · 1× RTX 5090Ollama 32s P95 latencyvLLM 5s P95 · ×6 faster

How to choose for your LocalIA rig

  • Starter (1× RTX 5090): Ollama for solo dev simplicity.
  • Pro (2× RTX 5090): vLLM for team batching — non-negotiable.
  • Enterprise (2× A6000 NVLink): vLLM mandatory for throughput.
Recommended hybrid setup on LocalIA Pro and Enterprise rigs: install both. Ollama for dev/debug, vLLM for production serving. They share the same HuggingFace model cache, so no double download.

Open the calculator / ask us for advice with your target model, users and constraints.

Frequently asked questions

vLLM or Ollama to serve an LLM in production?+
vLLM wins from 3+ concurrent users. Continuous batching gives ~3.3x total throughput and ~6x better P95 latency at 10 users versus Ollama. Ollama wins on install simplicity and for development / 1-2 users.
What real gain from vLLM vs Ollama on Llama 70B?+
On 2x RTX 5090: single user vLLM +14% (32 vs 28 tok/s). 4 concurrent users: vLLM 3.3x (98 vs 30 tok/s combined). 10 users: vLLM P95 6x faster (8s vs 47s).
Does vLLM use more VRAM than Ollama?+
No, vLLM uses ~6-8% less VRAM thanks to PagedAttention (paged KV-cache management, less fragmentation). On Llama 70B Q4: vLLM 44 GB, Ollama 47 GB. The gap widens on large contexts.
When to prefer Ollama over vLLM in 2026?+
For solo development / R&D, for Apple Silicon (vLLM does not support MPS), for frequent model hot-swapping, for 1-2 person usage. For multi-user production, vLLM is mandatory.
Can you use both in parallel?+
Yes, it is the recommended setup on a Pro/Enterprise build: Ollama for fast dev/debug, vLLM for production serving. Both share the same HuggingFace cache, so no double download.
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