MolmoAct 2 TPS calculator

Open weights Allen Institute for AI,University of Washington,National University of Singapore,University of Pennsylvania,Johns Hopkins University,Amazon,Cortex AI 5.5B parameters April 2026

Each card below is assessed against this model at the context length and minimum quality you choose. Speed is an estimate for a single request, calculated from the card's memory bandwidth and the size of the model once compressed.

Calculated for this model

818 cards that can run it

818 cards we hold specifications for

Smallest card that fits

Tesla C1080

4 GB · Q3_K_M · 18.1 tok/s

Fastest card

B200

618 tok/s · 180 GB

Which GPUs can run MolmoAct 2?

Set the inputs, read the answer

Context length tokens

A longer conversation needs more memory, which can push this model off smaller cards.

Minimum quality

Hides cards that would only fit the model by compressing it below this point.

Search cards

Card memory

Also show cards that cannot run it

818 cards match

Calculating

					Needs	Quantisation	Fit
618 tok/s 371–988 · low confidence	B200 NVIDIA	180 GB	8,000 GB/s	Jan 2024	6.6 GB	Q8_0	Comfortable
618 tok/s 371–988 · low confidence	B300 NVIDIA	288 GB	8,000 GB/s	Sep 2025	6.6 GB	Q8_0	Comfortable
493 tok/s 296–789 · low confidence	Radeon Instinct MI350X AMD	288 GB	8,190 GB/s	Jan 2025	6.6 GB	Q8_0	Comfortable
493 tok/s 296–789 · low confidence	Radeon Instinct MI355X AMD	288 GB	8,190 GB/s	Jan 2025	6.6 GB	Q8_0	Comfortable
394 tok/s 237–631 · low confidence	Radeon Instinct MI300 AMD	128 GB	6,550 GB/s	Jan 2023	6.6 GB	Q8_0	Comfortable
378 tok/s 227–604 · low confidence	H200 NVL NVIDIA	141 GB	4,890 GB/s	Nov 2024	6.6 GB	Q8_0	Comfortable
378 tok/s 227–604 · low confidence	H200 SXM 141 GB NVIDIA	141 GB	4,890 GB/s	Nov 2024	6.6 GB	Q8_0	Comfortable
361 tok/s 217–578 · low confidence	Radeon Instinct MI325X AMD	256 GB	6,000 GB/s	Oct 2024	6.6 GB	Q8_0	Comfortable
321 tok/s 192–513 · low confidence	Radeon Instinct MI300A AMD	128 GB	5,325 GB/s	Dec 2023	6.6 GB	Q8_0	Comfortable
321 tok/s 192–513 · low confidence	Radeon Instinct MI300X AMD	192 GB	5,325 GB/s	Dec 2023	6.6 GB	Q8_0	Comfortable
321 tok/s 192–513 · low confidence	Radeon Instinct MI308X AMD	192 GB	5,325 GB/s	Dec 2023	6.6 GB	Q8_0	Comfortable
304 tok/s 183–487 · low confidence	H100 NVL 94 GB NVIDIA	94 GB	3,940 GB/s	Mar 2023	6.6 GB	Q8_0	Comfortable
259 tok/s 156–415 · low confidence	H100 PCIe 96 GB NVIDIA	96 GB	3,360 GB/s	Mar 2023	6.6 GB	Q8_0	Comfortable
259 tok/s 156–415 · low confidence	H100 SXM5 80 GB NVIDIA	80 GB	3,360 GB/s	Oct 2022	6.6 GB	Q8_0	Comfortable
259 tok/s 156–415 · low confidence	H100 SXM5 94 GB NVIDIA	94 GB	3,360 GB/s	Mar 2023	6.6 GB	Q8_0	Comfortable
259 tok/s 156–415 · low confidence	H100 SXM5 96 GB NVIDIA	96 GB	3,360 GB/s	Mar 2023	6.6 GB	Q8_0	Comfortable
259 tok/s 156–415 · low confidence	H800 SXM5 NVIDIA	80 GB	3,360 GB/s	Mar 2023	6.6 GB	Q8_0	Comfortable
198 tok/s 119–316 · low confidence	Radeon Instinct MI250 AMD	128 GB	3,280 GB/s	Nov 2021	6.6 GB	Q8_0	Comfortable
198 tok/s 119–316 · low confidence	Radeon Instinct MI250X AMD	128 GB	3,280 GB/s	Nov 2021	6.6 GB	Q8_0	Comfortable
165 tok/s 99–263 · low confidence	Data Center GPU Max 1550 Intel	128 GB	3,280 GB/s	Jan 2023	6.6 GB	Q8_0	Comfortable
161 tok/s 97–258 · low confidence	Data Center GPU Max Subsystem Intel	128 GB	3,210 GB/s	Jan 2023	6.6 GB	Q8_0	Comfortable
158 tok/s 95–252 · low confidence	A100 SXM4 80 GB NVIDIA	80 GB	2,040 GB/s	Nov 2020	6.6 GB	Q8_0	Comfortable
158 tok/s 95–252 · low confidence	A100X NVIDIA	80 GB	2,040 GB/s	Jun 2021	6.6 GB	Q8_0	Comfortable
158 tok/s 95–252 · low confidence	A800 SXM4 80 GB NVIDIA	80 GB	2,040 GB/s	Aug 2022	6.6 GB	Q8_0	Comfortable
158 tok/s 95–252 · low confidence	H100 CNX NVIDIA	80 GB	2,040 GB/s	Mar 2023	6.6 GB	Q8_0	Comfortable

Speeds are estimates for a single request — one conversation at a time — calculated from memory bandwidth, model size and quantisation. Real throughput varies with the inference runtime and its version. Figures published by hardware vendors measure many simultaneous requests and are much higher.

On record

Full specification

Everything on record for this model. Most of it describes how it was trained rather than how it runs — useful context for judging how much work went into it, and how it compares with models built at a different scale.

Origin

Who built this model, where, and when it was published.

Organisation: Allen Institute for AI,University of Washington,National University of Singapore,University of Pennsylvania,Johns Hopkins University,Amazon,Cortex AI
Organisation type: Research collective,Academia,Academia,Academia,Academia,Industry,Industry
Country: United States of America, Singapore
Published: 5 April 2026
Authors: Haoquan Fang, Jiafei Duan, Donovan Clay, Sam Wang, Shuo Liu, Weikai Huang, Xiang Fan, Wei-Chuan Tsai, Shirui Chen, Yi Ru Wang, Shanli Xing, Jaemin Cho, Jae Sung Park, Ainaz Eftekhar, Peter Sushko, Karen Farley, Angad Wadhwa, Cole Harrison, Winson Han, Ying-Chun Lee, Eli VanderBilt, Rose Hendrix, Suveen Ellawela, Lucas Ngoo, Joyce Chai, Zhongzheng Ren, Ali Farhadi, Dieter Fox, Ranjay Krishna

What it does

The problem areas the model was built for. A model can carry several of each.

Domain: Vision, Language, Robotics
Task: Robotic manipulation

Size

How large the model is and how much data it was trained on. Parameters are the figure that decides whether it fits on a given graphics card.

Parameters: 5.5B
Training data: tokens

Training compute

The arithmetic performed to train the model, measured in floating-point operations. It is a measure of what the training run cost, not of how fast the finished model answers you.

Training compute: 1.1 × 10²² FLOP

The training run

What it physically took to train: which chips, how many, for how long, and what that drew from the wall.

Training hardware: NVIDIA H100 SXM5 80GB
Chips used: 64
Wall-clock time: 2,304 hours (96 days)
Power draw: 87.2 kW
Cloud vendor: Cirrascale Cloud Services
Data centre: Ai2 Jupiter, Austin, Texas

Availability

Whether you can obtain the model and run it on your own hardware, which is what decides if any of the graphics-card figures on this page apply.

Weights: Open — downloadable
Model access: Open weights (unrestricted)
Hugging Face: allenai

How it is classified

Labels the source dataset applies when tracking notable models, and how confident it is in the entry.

Why it is tracked: Discretionary
Record confidence: Likely

Sources

Where this record came from and when it was last checked.

Reference: MolmoAct2: Action Reasoning Models for Real-world Deployment
Last updated: 30 July 2026

The extremes

The ten fastest GPUs that run MolmoAct 2

Ranked by estimated tokens per second, newest card first where speeds tie. Because generation is bound by memory bandwidth, this ordering follows bandwidth rather than any gaming benchmark.

The smallest GPUs that still run MolmoAct 2

The cheapest route in, by memory capacity. A tight fit runs the model but leaves nothing spare for a longer conversation.

What the numbers mean

Hardware requirements in practice

Minimum card

Tesla C1080

Memory needed

3.4 GB

Fastest

618 tok/s

MolmoAct 2 reaches a parameter count of 5.5B. That is small enough that hardware is rarely the obstacle, including on cards several years old. The number of cards we track that can run it: 818.

The entry point is Tesla C1080, with a memory capacity of 4 GB, running it at a compression of Q3_K_M and producing around 18.1 tokens per second.

The fastest we calculate for it is B200, generating roughly 618 tokens per second on the strength of a memory bandwidth of 8,000 GB/s.

Background

MolmoAct 2 was published by Allen Institute for AI,University of Washington,National University of Singapore,University of Pennsylvania,Johns Hopkins University,Amazon,Cortex AI, in the country recorded as United States of America, during April 2026. The publishing organisation is categorised as research collective,Academia,Academia,Academia,Academia,Industry,Industry.

It works in the domain of Vision, Language, Robotics, and is recorded as performing the task of robotic manipulation.

Because its weights were released, nothing about running it depends on a provider staying available — it is yours once downloaded. On Hugging Face it is published under the organisation allenai.

Reading the throughput figures

Half the cards that hold it manage more than 25.8 tokens per second. Exceeding reading speed outright: 759 of them.

It is a dense model, so every parameter is read for every token produced. That makes speed track memory bandwidth almost exactly — a card with twice the bandwidth generates roughly twice as fast.

Memory here is estimated from size rather than computed from the architecture, which is not recorded for this model — the numbers are indicative rather than exact.

What went into building it

Training it took a computation budget of roughly 1.1 × 10²² FLOP, on hardware recorded as NVIDIA H100 SXM5 80GB. That figure measures what producing the model cost, and has no bearing on how fast it answers.

The reason it appears in this catalogue at all: discretionary.

Step by step

How to choose a GPU for MolmoAct 2

The table above has already assessed every card we hold specifications for against this model. Getting to your answer takes six steps.

01

Check what it needs before anything else

The table lists every card able to hold MolmoAct 2, needing around 3.4 GB at a compression of Q3_K_M. No amount of processing power compensates for a card that cannot hold it.
02

Set the context length you will work at

Set the context to what you will actually use. The cache grows with the conversation, and it is the usual reason a card that seemed fine stops fitting MolmoAct 2.
03

Choose how far you will compress it

The quantisation column varies by card, because a bigger card holds a more accurate copy, reaching a compression of Q3_K_M on the smallest card that fits. Setting a minimum quality drops the cards that only manage it by squeezing further than you would want, and holds the comparison at one level.
04

Rank by throughput rather than spec sheet

The speed ordering is effectively an ordering by memory bandwidth, for MolmoAct 2. It will not match a gaming ordering, because generation is bound by memory bandwidth. The card topping the list is B200, at 618 tok/s.
05

Check the fit verdict before buying

A tight fit runs, but leaves nothing spare for a longer conversation, in the case of MolmoAct 2. Comfortable means you can grow the context later. That difference matters more than a few tokens per second, so buy for comfortable if you expect to.
06

Open the card you have settled on

Each card page repeats this sweep for every model we hold, answering what else the hardware is good for beyond MolmoAct 2.

Answers

MolmoAct 2 — common questions

MolmoAct 2— why does the quantisation differ between cards?

Each card is shown running the least-compressed copy it can hold. The number of distinct compression levels across the cards that fit it: 4. Bigger cards get the more accurate version, and the quality floor above pins the comparison to one level.

MolmoAct 2— how accurate are these speed estimates?

These are estimates with real error bars, and any of them could reasonably land anywhere in its published range depending on which runtime you use. The fastest result here: 371–988 tok/s on B200. The same model and card vary by thirty to fifty per cent depending on the inference software and its version.

MolmoAct 2— what GPU do I need to run it?

The smallest card in our catalogue that holds it is Tesla C1080, with a memory capacity of 4 GB. It runs the model at a compression of Q3_K_M using about 3.4 GB, and produces roughly 18.1 tokens per second. The number of cards able to run it in total: 818.

MolmoAct 2— how fast is it on a GPU?

It depends on the card. The quickest we calculate is B200, at about 618 tokens per second; the slowest that still runs it manages considerably less. Reading speed is around ten tokens per second, and the number of cards clearing that: 759.

MolmoAct 2— how much VRAM does it need?

It needs about 3.4 GB at a compression of Q3_K_M, which is what the smallest card that runs it uses. Less compression needs more: the figures in the memory column above are recalculated for each card, because each one holds the least-compressed version it can.

MolmoAct 2— can I run it on a GPU holding 8 GB?

Yes. The card CMP 170HX 8 GB, holding 8 GB, runs it at a compression of Q8_0, using about 6.6 GB and generating roughly 115 tokens per second. The fit is tight.

MolmoAct 2— can I run it on a GPU holding 12 GB?

Yes. The card GeForce RTX 3080 Ti, holding 12 GB, runs it at a compression of Q8_0, using about 6.6 GB and generating roughly 70.5 tokens per second. The fit is comfortable.

MolmoAct 2— can I run it on a GPU holding 16 GB?

Yes. The card Tesla V100 SXM2 16 GB, holding 16 GB, runs it at a compression of Q8_0, using about 6.6 GB and generating roughly 87.3 tokens per second. The fit is comfortable.

MolmoAct 2— can I run it on a GPU holding 24 GB?

Yes. The card GeForce RTX 5090 D V2, holding 24 GB, runs it at a compression of Q8_0, using about 6.6 GB and generating roughly 103 tokens per second. The fit is comfortable.

MolmoAct 2— is it open source?

Its weights are published, so it can be downloaded and run on your own hardware. Note that open weights is not the same as open source in the full sense — it says nothing about the training data, the training code, or the commercial terms attached.

MolmoAct 2— how many parameters does it have?

It has a parameter count of 5.5B. From https://huggingface.co/allenai/MolmoAct2/blob/main/model.safetensors.index.json. That figure is the total, and it is what decides how much memory the model needs — roughly half a gigabyte per billion at the compression most people use.

MolmoAct 2— who created it?

It was published by Allen Institute for AI,University of Washington,National University of Singapore,University of Pennsylvania,Johns Hopkins University,Amazon,Cortex AI, based in United States of America, an organisation categorised as research collective,Academia,Academia,Academia,Academia,Industry,Industry.

MolmoAct 2— when was it released?

It was published in April 2026.

MolmoAct 2— what is it used for?

It works in the domain of Vision, Language, Robotics, and is recorded as handling the task of robotic manipulation. Models frequently carry more than one of each, and the tags describe purpose rather than capability limits.

MolmoAct 2— where can I download it?

Its weights are published on Hugging Face, under the organisation allenai. We do not host model files — this site calculates what hardware is needed to run them.

MolmoAct 2— how much compute was used to train it?

Training consumed around 1.1 × 10²² FLOP, on hardware recorded as NVIDIA H100 SXM5 80GB. That measures what producing the model cost and says nothing about how quickly it answers once trained — inference speed comes from memory bandwidth, not from the training budget.

MolmoAct 2— can I run it if it does not fit in my GPU?

It can be split between the card and system memory, but it generates painfully slowly that way. Every figure here assumes the whole model is resident on the card.

MolmoAct 2— would two GPUs run it faster?

A second card roughly doubles the memory available but not the generation rate. The number already able to run it alone: 818. So a second card is rarely the answer here.

Source

Original publication

Record last updated 30 July 2026

The other direction

Looking at it from the other side?

This page starts from the model. If you already own a card and want to know everything it will run, start from the hardware instead.

All AI models