readygpu

Magistral Small 2509

24B parameters · 128k context · Apache License 2.0 · released 2025-09-12

chatreasoningvisionagentic

In short

Magistral Small 2509 is an open model from Mistral AI with 24B parameters. At Q4_K_M, Magistral Small 2509 needs about 15 GB of memory at 8k context and 35 GB at 128k, counting the weights, the KV cache and runtime buffers. The cheapest hardware in the UK that runs Magistral Small 2509 fully in memory at 128k context is the NVIDIA RTX PRO 6000 Blackwell, £29,504 at Amazon, at about 24 tok/s (estimated).

Updated . Speeds are estimates; how they are worked out.

What to run it on in the UK

Fully in memory at 128k context, priced at retailers today.

All hardware that runs it

Everything we price, best value first. Two cards split the model by layers.

HardwareQuantFitsDecodePricetok/s per 1,000
Mac mini M4 Pro 48GBQ4_K_Mfits5 tok/s£3,0001.7
GMKtec EVO-X2 Ryzen AI Max+ 395 128GBQ8_0fits3 tok/s£3,3200.9
Mac Studio M4 Max 64GBQ8_0fits8 tok/s£3,3992.2
Mac Studio M3 Ultra 96GBQ8_0fits11 tok/s£5,4992.1
Mac Studio M3 Ultra 256GBQ8_0fits11 tok/s£8,4991.3
Mac Studio M3 Ultra 512GBQ8_0fits11 tok/s£17,4950.7
NVIDIA RTX PRO 6000 BlackwellQ8_0fits24 tok/s£29,5040.8
Mac Studio M4 Max 128GBQ8_0fits8 tok/s––
Mac mini M4 Pro 64GBQ8_0fits4 tok/s––
Framework Desktop Ryzen AI Max+ 395 128GBQ8_0fits3 tok/s––
NVIDIA DGX Spark 128GBQ8_0fits4 tok/s––
ASUS Ascent GX10 128GBQ8_0fits4 tok/s––
Framework Desktop Ryzen AI Max+ 395 64GBQ8_0fits3 tok/s––
NVIDIA Tesla P40Q4_K_Moffload3 tok/s£26111.5
AMD Radeon RX 7600 XTQ4_K_Moffload2 tok/s£3486.0
Intel Arc B580Q4_K_Moffload2 tok/s£3495.5
NVIDIA GeForce RTX 3060 12GBQ4_K_Moffload2 tok/s£3904.9
NVIDIA GeForce RTX 3080 10GBQ4_K_Moffload2 tok/s£4664.1
AMD Radeon RX 9060 XT 16GBQ4_K_Moffload2 tok/s£4994.2
NVIDIA GeForce RTX 5060 Ti 16GBQ4_K_Moffload2 tok/s£5504.2
AMD Radeon RX 7800 XTQ4_K_Moffload2 tok/s£5684.0
Intel Arc A770 16GBQ4_K_Moffload2 tok/s£5883.7
AMD Radeon RX 9070 XTQ4_K_Moffload2 tok/s£6703.4
NVIDIA GeForce RTX 5070Q4_K_Moffload2 tok/s£6952.9
Intel Arc Pro B60Q4_K_Moffload3 tok/s£7424.0
AMD Radeon RX 7900 XTQ4_K_Moffload3 tok/s£7893.5
NVIDIA GeForce RTX 4070 SuperQ4_K_Moffload2 tok/s£8742.3
NVIDIA GeForce RTX 4070 Ti SuperQ4_K_Moffload2 tok/s£9502.5
NVIDIA GeForce RTX 5070 TiQ4_K_Moffload2 tok/s£9752.5
NVIDIA GeForce RTX 4060 Ti 16GBQ4_K_Moffload2 tok/s£9772.1
AMD Radeon RX 7900 XTXQ4_K_Moffload4 tok/s£9993.6
NVIDIA GeForce RTX 5080Q4_K_Moffload2 tok/s£1,1992.0
NVIDIA GeForce RTX 4080 SuperQ4_K_Moffload2 tok/s£1,4291.7
AMD Radeon AI PRO R9700Q4_K_Moffload6 tok/s£1,6743.6
NVIDIA GeForce RTX 3090Q4_K_Moffload4 tok/s£1,7072.2
NVIDIA GeForce RTX 3090 TiQ4_K_Moffload4 tok/s£2,1991.7
NVIDIA GeForce RTX 5090Q4_K_Moffload10 tok/s£5,0002.1
NVIDIA GeForce RTX 4090Q4_K_Moffload4 tok/s£6,0150.6

2 other cards and machines we price cannot hold it at this context.

Memory needed

Weights, KV cache and runtime buffers at each context length (KV cache at fp16).

QuantFile@8k@32k@64k@128k
Q4_K_Mgguf13.3 GB15.3 GB19.2 GB24.4 GB34.8 GB
Q5_K_Mgguf15.6 GB17.6 GB21.5 GB26.7 GB37.1 GB
Q8_0gguf23.3 GB25.3 GB29.2 GB34.4 GB44.8 GB

Run it

Copy a command for the runtime you use.

  • Q4_K_M
    • Ollamaollama run hf.co/mistralai/Magistral-Small-2509-GGUF:Q4_K_M
    • LM Studiolms get mistralai/Magistral-Small-2509-GGUF@q4_k_m
    • llama.cppllama-server -hf mistralai/Magistral-Small-2509-GGUF:Q4_K_M
  • Q5_K_M
    • Ollamaollama run hf.co/mistralai/Magistral-Small-2509-GGUF:Q5_K_M
    • LM Studiolms get mistralai/Magistral-Small-2509-GGUF@q5_k_m
    • llama.cppllama-server -hf mistralai/Magistral-Small-2509-GGUF:Q5_K_M
  • Q8_0
    • Ollamaollama run hf.co/mistralai/Magistral-Small-2509-GGUF:Q8_0
    • LM Studiolms get mistralai/Magistral-Small-2509-GGUF@q8_0
    • llama.cppllama-server -hf mistralai/Magistral-Small-2509-GGUF:Q8_0

Notes

The card says performance might degrade past 40k tokens of context, even though the window is 128k. It recommends vLLM with mistral_common >= 1.8.5, and [THINK]/[/THINK] must be encoded as special tokens.

Questions

How much VRAM does Magistral Small 2509 need?
At Q4_K_M, Magistral Small 2509 needs about 15 GB of memory at 8k context and 35 GB at 128k, counting the weights, the KV cache and runtime buffers.
What is the best GPU for running Magistral Small 2509 locally?
The cheapest hardware in the UK that runs Magistral Small 2509 fully in memory at 128k context is the NVIDIA RTX PRO 6000 Blackwell, £29,504 at Amazon, at about 24 tok/s (estimated).
Can I run Magistral Small 2509 on a 16 GB GPU?
Only partly: at 128k context it does not fit in 16 GB, so part of it runs from system RAM and it slows to about 2 tok/s on the AMD Radeon RX 7600 XT (estimated).
Can I run Magistral Small 2509 on a 24 GB GPU?
Only partly: at 128k context it does not fit in 24 GB, so part of it runs from system RAM and it slows to about 3 tok/s on the NVIDIA Tesla P40 (estimated).
How do I run Magistral Small 2509 locally?
With Ollama: ollama run hf.co/mistralai/Magistral-Small-2509-GGUF:Q4_K_M (the Q4_K_M build). LM Studio and llama.cpp commands are on this page.
What licence is Magistral Small 2509 released under?
Apache License 2.0, which allows commercial use.