Best GPU for Local AI Agents

作者： Jakub Rusinowski · 最后更新： 2026年7月21日

Ranked for autonomous agents and tool use: Multi-step autonomous loops where the model calls tools, reads results and decides what to do next.

Best overall: AMD Radeon RX 7900 XTX

24 GB VRAM at 960 GB/s. It runs 24 of the models that qualify for this workload; the strongest is Ternary Bonsai 27B at an estimated 38.3 tokens/sec.

The picks

	GPU	VRAM	MSRP	Models that fit	Best model it runs	Est. speed
Best overall	AMD Radeon RX 7900 XTX	24 GB	$999	24	Ternary Bonsai 27B	~38.3 tok/s
Best value	Intel Arc B570	10 GB	$219	7	GLM-6 9B	~42.7 tok/s
Budget pick	Intel Arc B570	10 GB	$219	7	GLM-6 9B	~42.7 tok/s
Most memory	NVIDIA DGX Spark	128 GB	$4,699	30	Devstral-2 123B	~2.7 tok/s

GPU	Score	VRAM	MSRP	Models fit	Est. speed	Tok/s per watt	Cost per model
AMD Radeon RX 7900 XTX	74.7	24 GB	$999	24	~38.3	0.11	$42
NVIDIA GeForce RTX 4090	73.7	24 GB	$1,599	24	~40.1	0.09	$67
NVIDIA GeForce RTX 5070 Ti	72.9	16 GB	$749	12	~39.9	0.13	$62
NVIDIA GeForce RTX 5090	72.7	32 GB	$1,999	24	~66.6	0.12	$83
NVIDIA GeForce RTX 3090	72.2	24 GB	$1,499	24	~37.4	0.11	$62
NVIDIA GeForce RTX 5080	70.8	16 GB	$999	12	~42.5	0.12	$83
NVIDIA RTX 6000 Ada Generation	70.6	48 GB	$6,799	24	~38.3	0.13	$283
AMD Radeon RX 7900 XT	70.5	20 GB	$899	17	~32.4	0.1	$53
AMD Radeon RX 9070 XT	69	16 GB	$599	12	~32.5	0.15	$50
NVIDIA L40S	67.2	48 GB	$7,499	24	~34.8	0.1	$312
AMD Radeon RX 9070	66.9	16 GB	$549	12	~29.3	0.13	$46
AMD Radeon RX 7800 XT	66.8	16 GB	$499	12	~28.6	0.11	$42

GPUs are scored on four axes: capability (45%), speed (30%), value (20%) and efficiency (5%), each normalised across the whole ranking.
Capability means the intrinsic strength of the best model the card can hold — not how many models fit, and not how fast it streams a small one.
Speed is capped at 40 tok/s: past that, more throughput does not change how the model feels to use.
Apple Silicon is excluded from this ranking. Those entries price a whole computer and rate a chip's package power, so on price-per-capability and performance-per-watt they would beat every add-in card by construction. Apple hardware is covered on the macOS platform page instead.
Reliable structured tool calls are a hard gate here, not a bonus: a model with no tool-use tag is excluded regardless of score. Coding weight is high (40%) because tool arguments are effectively code. Context needs match RAG — an agent loop accumulates every observation it has ever seen.

The AMD Radeon RX 7900 XTX — 24 GB of VRAM runs 24 qualifying models, the strongest being Bonsai 27B.

The Intel Arc B570 at $219, which runs 7 qualifying models.

8 GB is the entry point at which a model for this workload will run at all. More memory buys a stronger model, not just a faster one.