the best GPU for running an AI coding assistant locally in 2026 — private Copilot, your hardware

A local coding model gives you a private, offline, unlimited Copilot — but the good coding models are big. Here's the GPU you need to run them well,… Aliteq Ravi Malhotra · Hardware Editor

Best: 24GB card (used RTX 3090 ~$850-1,200, or 4090) — runs Qwen3-Coder-30B and other strong coders well.

Good: 16GB card (4070 Ti Super / 5070 Ti) — solid 14B coding models with decent context.

Budget: 12GB (RTX 3060 12GB) — capable smaller coders; fine for autocomplete and light help.

VRAM is the gate — coding models are large, and context (your codebase) eats more on top.

The payoff: a private, offline, unlimited Copilot — your code never leaves your machine.

A 24GB card — a used RTX 3090 (~$850-1,200) or RTX 4090 — is the best GPU for a local AI coding assistant, running strong coders like Qwen3-Coder-30B with room for your codebase in context. 16GB…

Best GPU for local AI coding 2026

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