Allen AIOLMoOlmo3ForCausalLM

Olmo 3 32B Think — Hardware Requirements & GPU Compatibility

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Olmo 3 32B Think is Allen Institute for AI's reasoning-focused model in the fully open Olmo 3 family, trained to produce long chains of thought before answering so it can work through math and coding problems step by step. It is pretrained on Ai2's Dolma 3 corpus and then carried through a full post-training pipeline of supervised fine-tuning, direct preference optimization, and reinforcement learning with verifiable rewards on the Dolci-Think-RL dataset; Ai2 releases the code, intermediate checkpoints, and training logs for each stage, not just the final weights. It sits alongside a 7B Think and a 7B Instruct sibling in the same release. At 32 billion parameters it needs a high-end consumer GPU or a multi-GPU setup once quantized. Context length is 65,536 tokens. It is released under the Apache 2.0 license, though Ai2 asks that it be used for research and educational purposes in line with its Responsible Use Guidelines. It was published in November 2025 and has since been superseded by Olmo 3.1 32B Think.

32.2B params · dense66K contextApache 2.0Nov 202512.1K downloads177 likes35.6K quant downloads

Your hardware

Verdicts below are for the reference RTX 4090. Set yours to personalise the page.

Detection reads your browser's GPU name with no data sent anywhere.

Decent on a 24 GB GPU

Runs from 12 GB (IQ2_XS · 16K)Best on 24 GB (Q4_K_M · ~33 tok/s · 32K)Macs from 16 GB (IQ2_S · ~13 tok/s)

Apache 2.0

Reference GPU · RTX 4090 24 GB

Estimates, ±20% · how we estimate

Run Olmo 3 32B Think

One recommended way. Every other method, OS and quant is in the step-by-step guide.Each way opens a step-by-step guide for your OS and quant.

Ways to runOther ways

each opens step-by-step

Run in cloud

Runs on RTX 5090 (32 GB) (10 GB headroom) · Q4_K_M

Generation speed: ~58 tok/s; generation speed
Cost per 1M output tokens: $2.39; per 1M output tokens

Deployon Vast.aiBest valuefrom $0.50/hr

Compare GPUs →

Run Olmo 3 32B Think

21.5 GB VRAM at 16K context · fits the RTX 4090 (2.5 GB free)

Works on macOS, Windows and Linux.

Install Ollama (Linux)
$curl -fsSL https://ollama.com/install.sh | sh
Install Ollama (macOS / Windows)
Download and run the app; it installs the ollama command.
Download Ollama ↗
Run Q4_K_M
$ollama run olmo-3:32b
Official Ollama library build. For the exact Q4_K_M file from unsloth/Olmo-3-32B-Think-GGUF: ollama run hf.co/unsloth/Olmo-3-32B-Think-GGUF:Q4_K_M
Raise the context window
Type it inside the chat. For the API server instead, start it with OLLAMA_CONTEXT_LENGTH=16384 ollama serve.
$/set parameter num_ctx 16384
A larger context needs more memory than the weights alone.
Use the API
Ollama serves its API on http://localhost:11434.

Works on macOS, Windows and Linux.

Install LM Studio
Desktop app for macOS (Apple silicon), Windows and Linux.
lmstudio.ai ↗
Download the model
In the app press Ctrl/Cmd + Shift + M and search allenai/olmo-3-32b-think, then pick Q4_K_M. Or use the CLI (run LM Studio once first):
$lms get allenai/olmo-3-32b-think@q4_k_m
Open on Hugging Face ↗
Load and chat
Open the model loader, select the model and set Context Length to 16384. Leave GPU offload at maximum if it fits.
Start the local server (optional)
$lms server start

Works on macOS, Windows and Linux.

Install llama.cpp (macOS)
MacPorts, Nix and conda-forge also work.
$brew install llama.cpp
Install options ↗
Install llama.cpp (Windows)
$winget install llama.cpp
Install llama.cpp (Linux)
Download the prebuilt llama-*-bin-ubuntu-* archive for your GPU backend (CPU, Vulkan) from the releases page, unpack it and run the binaries from that folder. Homebrew (brew install llama.cpp) and conda-forge also work on Linux.
llama.cpp releases ↗
Start the server
Downloads the model on first run. The chat UI and an OpenAI-compatible API are at http://localhost:8080.
$llama-server -hf unsloth/Olmo-3-32B-Think-GGUF:Q4_K_M -c 16384 -ngl 99 --port 8080

Works on macOS, Windows and Linux.

Option A: Docker Model Runner
Docker Desktop: Settings > AI > Enable Docker Model Runner. Docker Engine on Linux: install the docker-model-plugin package.
$docker model run hf.co/unsloth/Olmo-3-32B-Think-GGUF:Q4_K_M
Model Runner docs ↗
The quant tag after the repo is how Hugging Face cards write it; if your Docker version rejects it, drop the tag and pick the quant by repo.
Option B: llama.cpp server image (NVIDIA)
Needs the NVIDIA Container Toolkit. Models are cached in the llama-cache volume. Open http://localhost:8080.
$docker run --gpus all -p 8080:8080 -v llama-cache:/root/.cache ghcr.io/ggml-org/llama.cpp:server-cuda -hf unsloth/Olmo-3-32B-Think-GGUF:Q4_K_M -c 16384 -ngl 99 --host 0.0.0.0 --port 8080
Image tags (cuda13, vulkan, rocm) ↗
Cache path inside the image is not in the docs; remove the -v flag if the volume complains.

Linux only.

Install vLLM
Linux only; on Windows run it inside WSL2. NVIDIA GPU shown; AMD ROCm, Intel and CPU builds have their own install pages.
$uv venv --python 3.12 --seed
$source .venv/bin/activate
$uv pip install vllm --torch-backend=auto
vLLM installation ↗
Serve the model
OpenAI-compatible API at http://localhost:8000/v1.
$vllm serve allenai/Olmo-3-32B-Think --max-model-len 16384
Runs the original weights, not the Q4_K_M GGUF; needs ~71 GB of GPU memory.

macOS only.

MLX supports only macOS, so follow these steps for that setup.

Install mlx-lm
$pip install mlx-lm
Chat in the terminal
$mlx_lm.chat --model lmstudio-community/Olmo-3-32B-Think-MLX-4bit
Downloads the model on first run. The MLX repo has its own quantisation; it may not match the quant selected above.
Or start a local server
Listens on http://localhost:8080.
$mlx_lm.server --model lmstudio-community/Olmo-3-32B-Think-MLX-4bit

Works on macOS, Windows and Linux.

Install Jan
jan.ai ↗
Find the model
Open the Hub tab, paste this model ID in Search, and choose Q4_K_M if offered.
$unsloth/Olmo-3-32B-Think-GGUF
Use the local API (optional)
Settings > Local API Server > Start Server. It listens on http://127.0.0.1:1337.

Rent GPUs hourly to run Q4_K_M right there. Pricing comes from partner marketplaces and varies.

Available GPU rentals for Q4_K_M, prioritized by value
GPU	Speed	$/1M tokens	Rent
RTX 5090 (32 GB)CheapestCheapest10 GB free	~58 tok/s	$2.39	Deploy on Vast.aifrom $0.50/hr (opens in new tab)	32 GB · 10 GB free · ~58 tok/s · $2.39 / 1M tokens
RTX PRO 4500 (32 GB)10 GB free	~29 tok/s	$3.27	Deploy on RunPodfrom $0.34/hr (opens in new tab)	32 GB · 10 GB free · ~29 tok/s · $3.27 / 1M tokens
A40 (48 GB)26 GB free	~22 tok/s	$4.34	Deploy on RunPodfrom $0.35/hr (opens in new tab)	48 GB · 26 GB free · ~22 tok/s · $4.34 / 1M tokens
RTX PRO 4500 (32 GB)10 GB free	~29 tok/s	$3.42	Deploy on Vast.aifrom $0.36/hr (opens in new tab)	32 GB · 10 GB free · ~29 tok/s · $3.42 / 1M tokens
RTX A6000 (48 GB)26 GB free	~25 tok/s	$4.55	Deploy on Vast.aifrom $0.40/hr (opens in new tab)	48 GB · 26 GB free · ~25 tok/s · $4.55 / 1M tokens
A100 40GB18 GB free	~50 tok/s	$3.38	Deploy on Vast.aifrom $0.61/hr (opens in new tab)	18 GB free · ~50 tok/s · $3.38 / 1M tokens
RTX 5090 (32 GB)10 GB free	~58 tok/s	$3.32	Deploy on RunPodfrom $0.69/hr (opens in new tab)	32 GB · 10 GB free · ~58 tok/s · $3.32 / 1M tokens
RTX PRO 4500 Server (32 GB)10 GB free	~26 tok/s	$7.75	Deploy on RunPodfrom $0.72/hr (opens in new tab)	32 GB · 10 GB free · ~26 tok/s · $7.75 / 1M tokens

Compare GPUs →

How Much VRAM Does Olmo 3 32B Think Need?

Select a quantization level; the listed hardware adheres to it.

VRAM	+32K	+128K	File	Quality	On RTX 4090 (reference)
9.7 GB	12.1 GB	—	8.9 GB	2-bit · i-quant extreme compression — Importance-weighted 2-bit, extreme compression — significant quality loss	Fits: 64K context · ~68 tok/s
10.5 GB	12.9 GB	—	9.7 GB	2-bit · i-quant extra small — Importance-weighted 2-bit, extra small	Fits: 64K context · ~62 tok/s
10.9 GB	13.3 GB	—	10.1 GB	2-bit · i-quant small — Importance-weighted 2-bit, small	Fits: 64K context · ~60 tok/s
11.7 GB	14.1 GB	—	11 GB	2-bit · i-quant medium — Importance-weighted 2-bit, medium	Fits: 64K context · ~56 tok/s
13.3 GB	15.8 GB	—	12.7 GB	3-bit · i-quant — Importance-weighted 3-bit	Fits: 64K context · ~49 tok/s
13.7 GB	16.2 GB	—	11.2 GB	2-bit · small K-quant — 2-bit small K-quant	Fits: 64K context · ~48 tok/s
14.1 GB	16.6 GB	—	13.4 GB	3-bit · i-quant extra small — Importance-weighted 3-bit, extra small	Fits: 64K context · ~46 tok/s
14.5 GB	17 GB	—	14.1 GB	3-bit · i-quant small — Importance-weighted 3-bit, small	Fits: 64K context · ~45 tok/s
14.5 GB	17 GB	—	12 GB	2-bit · K-quant — 2-bit quantization with K-quant improvements	Fits: 64K context · ~45 tok/s
14.9 GB	17.4 GB	—	14.1 GB	3-bit small — 3-bit small quantization	Fits: 64K context · ~44 tok/s
15.3 GB	17.8 GB	—	14.5 GB	3-bit · i-quant medium — Importance-weighted 3-bit, medium	Fits: 64K context · ~43 tok/s
16.6 GB	19 GB	—	15.6 GB	3-bit medium — 3-bit medium quantization	Fits: 64K context · ~40 tok/s
16.9 GB	19.4 GB	—	18.3 GB	4-bit · legacy — 4-bit legacy quantization	Fits: 64K context · ~39 tok/s
17.4 GB	19.8 GB	—	16.9 GB	3-bit large — 3-bit large quantization	Fits: 64K context · ~38 tok/s
18.2 GB	20.6 GB	—	17.3 GB	4-bit · i-quant compact — Importance-weighted 4-bit, compact	Fits: 64K context · ~36 tok/s
19.0 GB	21.4 GB	—	20.3 GB	4-bit · legacy+ — 4-bit legacy quantization with offset	Fits: 64K context · ~35 tok/s
19.0 GB	21.4 GB	—	18.4 GB	4-bit small — 4-bit small quantization	Fits: 64K context · ~35 tok/s
19.0 GB	21.4 GB	—	18.3 GB	4-bit · i-quant non-linear — Importance-weighted 4-bit, non-linear	Fits: 64K context · ~35 tok/s
20.2 GB	22.6 GB	—	19.5 GB	4-bit medium — 4-bit medium quantization — most popular sweet spot	Fits: 32K context · ~33 tok/s
20.6 GB	23 GB	—	19.9 GB	4-bit large — 4-bit large quantization	Fits: 32K context · ~32 tok/s
23 GB	25.4 GB	—	22.2 GB	5-bit small — 5-bit small quantization	Fits: 8K context · ~29 tok/s
23.8 GB	26.2 GB	—	22.9 GB	5-bit medium — 5-bit medium quantization — good quality/size tradeoff	Fits: 2K context · ~28 tok/s
24.2 GB	26.6 GB	—	23.2 GB	5-bit large — 5-bit large quantization	Does not fit: needs 25.6 GB
27.4 GB	29.9 GB	—	26.4 GB	6-bit, very good — 6-bit quantization, very good quality	Does not fit: needs 28.8 GB
33.1 GB	35.5 GB	—	34.3 GB	8-bit, near-lossless — 8-bit quantization, near-lossless	Does not fit: needs 34.4 GB
65.3 GB	67.7 GB	—	64.5 GB	16-bit · bfloat — Brain floating point 16 — preferred for training	Does not fit: needs 66.6 GB

Selected Q4_K_M

4-bit medium quantization

21.5GBat 16K context

Weights: 19.3 GB
KV cache: 1.9 GB
Overhead: 0.3 GB

Fits RTX 4090 (reference) · 2.5 GB free · ~33 tok/s

≥50 tok/s needs ≥1.55 TB/s · RTX 5090 ~58

Which Hardware Can Run Olmo 3 32B Think?

Q4_K_M · 20.2 GB

Olmo 3 32B Think (Q4_K_M) requires 20.2 GB of VRAM to load the model weights. For comfortable inference with headroom for KV cache and system overhead, 27+ GB is recommended. Using the full 66K context window can add up to 4.6 GB, bringing total usage to 24.7 GB. 7 GPUs can run it, including NVIDIA GeForce RTX 5090, NVIDIA GeForce RTX 3090 Ti. 122 devices with unified memory can run Olmo 3 32B Think, including Mac Studio (M3 Ultra, 256GB), Mac Studio (M3 Ultra, 512GB), Mac Studio M1 Max (32 GB).

By VRAM tier · typical GPUs and Macs at Q4_K_M

Typical hardwareQuantVRAMtok/sContext that fits

8 GB · RTX 4060Doesn't fit — smallest quant needs 11 GB8 GB tier →

12 GB · RTX 3060 12GBIQ2_XS · 11.9 GB · ~22 tok/s · 16K11.9~2216K12 GB tier →

16 GB · RTX 5060 Ti 16GBIQ3_S · 15.9 GB · ~20 tok/s · 16K15.9~2016K16 GB tier →

24 GB · RTX 4090referenceQ4_K_M · 21.5 GB · ~33 tok/s · 32K21.5~3332K24 GB tier →

Mac 32 GB · Mac Mini M4Q4_K_M · 21.5 GB · ~4 tok/s · 64K21.5~464KMacs →

Mac 64 GB · Mac Studio M4 MaxQ4_K_M · 21.5 GB · ~19 tok/s · 64K21.5~1964KMacs →

How good is Olmo 3 32B Think?

llmrun Score blends public benchmark boards into one number; 100 = the average open model.

Not enough data yet for an llmrun Score.

A Score needs results on enough independent boards. How the Composite Score is built

Benchmarks

LMArena Text
LMArena · Oct 2026Arena
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Olmo 3 32B Think benchmark results

Alternatives to Olmo 3 32B Think

OLMo family · 20 models →

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6tok/s on RTX 4090

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Nanbeige4.3 33BNanbeige	—	23.7 GB	~32	same size
Hy Memory 30B A3BTencent	—	19.1 GB	~184	same size
Granite Switch 4.1 30BIBM	—	22.7 GB	~35	same size
Llm Jp 4.1 32B A3b Thinkingllm-jp	—	20.1 GB	~188	same size
Llm Jp 4.1 33B Thinkingllm-jp	—	22.5 GB	~35	same size
Agnes 3.0 FlashAgnes-AI	—	22.1 GB	~35	same size

Specifications

Publisher: Allen AI
Family: OLMo
Parameters: 32.2B
Architecture: Olmo3ForCausalLM
Context Length: 65,536 tokens
Vocabulary Size: 100,278
Release Date: 2025-11-19
License: Apache 2.0

Resources

Frequently Asked Questions

How much VRAM does Olmo 3 32B Think need?

Olmo 3 32B Think requires 20.2 GB of VRAM at Q4_K_M, or 65.3 GB at BF16. Full 66K context adds up to 4.6 GB (24.7 GB total).

VRAM = Weights + KV Cache + Overhead

Weights = 32.2B × 4.8 bits ÷ 8 = 19.3 GB

KV Cache + Overhead ≈ 0.9 GB (at 2K context + ~0.3 GB framework)

Fit ratings and hardware model lists check this model with room for a 16K-token context, which needs a little more memory.

KV Cache + Overhead ≈ 5.4 GB (at full 66K context)

VRAM usage by quantization

Q4_K_M

20.2 GB

Q4_K_M + full context

24.7 GB

Learn more about VRAM estimation →

Can NVIDIA GeForce RTX 4090 run Olmo 3 32B Think?

Yes, at Q5_K_M (23.8 GB) or lower. Higher quantizations like Q5_K_L (24.2 GB) exceed the NVIDIA GeForce RTX 4090's 24 GB.

What's the best quantization for Olmo 3 32B Think?

For Olmo 3 32B Think, Q4_K_M (20.2 GB) offers the best balance of quality and VRAM usage. Q4_K_L (20.6 GB) provides better quality if you have the VRAM. The smallest option is IQ2_XXS at 9.7 GB.

VRAM requirement by quantization

IQ2_XXS

9.7 GB~53%

IQ3_XS

14.1 GB~73%

Q3_K_L

17.4 GB~86%

Q4_K_M ★

20.2 GB~89%

Q4_K_L

20.6 GB~90%

BF16

65.3 GB~100%

★ Recommended — best balance of quality and VRAM usage.

Learn more about quantization →

Can I run Olmo 3 32B Think on a Mac?

Yes — Mac Mini M2 Pro (16 GB) and 133 other Macs can run Olmo 3 32B Think, the smallest at IQ2_S. Apple Silicon uses unified memory, so the model shares RAM with the system. At Q4_K_M you need at least 20.2 GB of usable unified memory (RAM minus macOS overhead), from Mac Mini M5 Pro (24 GB).

Can I run Olmo 3 32B Think locally?

Yes — Olmo 3 32B Think can run locally on consumer hardware. Popular tools include Ollama, LM Studio, and llama.cpp.

How fast is Olmo 3 32B Think?

At Q4_K_M, Olmo 3 32B Think can reach ~238 tok/s on AMD Instinct MI350X. On NVIDIA GeForce RTX 4090: ~33 tok/s. Speed depends mainly on GPU memory bandwidth. Real-world results typically within ±20%.

tok/s = (bandwidth GB/s ÷ model GB) × efficiency

Example: NVIDIA B200 → 8000 ÷ 20.18 × 0.65 = ~258 tok/s

Estimated speed at Q4_K_M (20.2 GB)

NVIDIA B200

~258 tok/s

NVIDIA GeForce RTX 4090

~33 tok/s

NVIDIA B300

~258 tok/s

AMD Instinct MI350X

~238 tok/s

Real-world results typically within ±20%. Speed depends on batch size, quantization kernel, and software stack.

Learn more about tok/s estimation →

What's the download size of Olmo 3 32B Think?

At Q4_K_M, the download is about 19.34 GB. The full-precision BF16 version is 64.47 GB. The smallest option (IQ2_XXS) is 8.86 GB.

Which GPUs can run Olmo 3 32B Think?

7 consumer GPUs can run Olmo 3 32B Think at Q4_K_M. Top options include NVIDIA GeForce RTX 5090, AMD Radeon RX 7900 XTX, NVIDIA GeForce RTX 3090. 1 GPU has plenty of headroom for comfortable inference.

Which devices can run Olmo 3 32B Think?

122 devices with unified memory can run Olmo 3 32B Think at Q4_K_M (20.2 GB), including AMD Ryzen AI 9 HX 370 (Strix Point) Laptop, ASUS Ascent GX10, Beelink GTR9 Pro (Ryzen AI Max+ 395, 128 GB), Framework Desktop (Ryzen AI Max+ 395, 128 GB). Apple Silicon Macs use unified memory shared between CPU and GPU, making them well-suited for local LLM inference.