r/vastai

Hi guys. So, here is my build:
- AMD Ryzen 9 9950X3D
- Corsair A115
- ASUS ROG Strix B850-E Gaming WiFi
- ASUS ROG Astral GeForce RTX 5080 OC Edition
- 32 GB DDR5-6000 (2×16 GB) Corsair CL30 with EXPO
- SSD m.2 Movespeed NVMe 2 TB
- Corsair RM1000x Shift
- All packed within a Corsair 4000D Frame with x9 Corsair fans
I undervolted the CPU and GPU, and I am willing to rent out my PC while at work. It would be available 12 hours per week for 5 days straight. My energy rate is US$0.216 per kWh. Do you think it is worth it? I am totally new to this; advice of all kinds is welcome. Thanks in advance!

Following up on the on-demand comparison from a couple weeks back - pulled spot/ interruptible pricing this time since that's where the real savings conversation actually lives for anyone running checkpointed training or batch jobs.

Checked: June 2026. Spot/interruptible tier, single GPU.

~ H100 80GB -Spot/Interruptible

RunPod :- $1.80-$2.40/hr , Community spot, can terminate without notice. Vast.ai :- $1.47-$2.00/hr (low end seen as low as $1.03/hr in thinner markets) wide range, host-dependent. AWS (P5, spot) :- technically available, $2.50-$3.10/hr extremely limited, frequently unavailable at any price.

~ A100 80GB - Spot/Interruptible

RunPod :- community spot as low as $0.20-0.40/hr (high variance) , reliability drops fast at this end. Vast.ai:- $0.67/hr typical, lower with thinner-reliability hosts, marketplace bidding, varies by host score. AWS (P4d, spot) :- ~$1.00-1.50/hr more consistently available than P5 spot.

What stood out:

• The spot discount vs on-demand is real - 40-60% off on H100, sometimes more on A100 - but the spread between providers on spot is much wider than on-demand. You're not comparing apples to apples, you're comparing apples to "whatever fell off the truck this hour."
• AWS spot for H100 (P5) is more of a theoretical price point than a practical one right now - availability is thin enough that "checked the price" and "could actually get one" are two different questions.
• Vast.ai's floor prices look incredible until you check host reliability scores. The $0.67/hr A100 and the $1.50/hr A100 are not the same product even though they're listed the same way.

This tier only makes sense if your job checkpoints well - anything customer-facing or latency-sensitive, spot isn't worth the risk regardless of price.

Not selling anything, just tracking this for my own training runs and figured others here are doing the same math. Anyone actually running production batch jobs on spot right now? Curious what interruption rates you're actually seeing vs what's advertised.

Guys what’s the preferred pci e gen for the host machine with one 3090 in it. I got one 3090 and I wanna know if I can use the gen3 motherboard I have to get a gen4 motherboard for the host machine.

Hi, I have a pretty heavy workflow in terms of nodes and models—there are quite a few that need to be loaded. I know vast.ai has a storage option, but it's a bit too expensive for my budget. That’s why I was thinking about setting up my ComfyUI workflow on Google Drive via a Colab notebook and then accessing that workflow from vast.ai; do you think this is possible? I look forward to your comments.

Beautiful day lovely humans,

I went to the YouTube channel, the blog, and even troubleshooted with AI.

My goal is to utilize open source AI models for image/video creation. My issue is comfyUI attempts to download those models directly on my laptop. && the reason I rented the space is to keep my computer light.

Additional context: Applied 'all-in-one-app-studio' template, ComfyUI template and neither populated properly upon opening the instance. Gemini was able to help me create a template of my own (based upon my goals) that successfully opened ComfyUI in my browser.

Gemini had me run a few commands in a new Jupyter terminal. There was one that kept coming across an error. I even tried to download the models manually in comfyUI via manager.

The bot suggested Runpod, but I wonder if it's something that I'm doing incorrectly? If so, I don't want to switch to another platform so quickly.

Any advice?

Yesterday I wanted to test out a code. Found an RTX 5090 for about $0.43 an hour. Reasonable.

After about 10 minutes, the 23 GB code was downloaded but it wouldn't run. So back to the drawing board. I destroyed my instance and immediately I was charged $0.53 (roughly).

Immediately I chatted with the help desk. They looked into it and gave me a screenshot of my billing. The instance was $0.43 an hour and I didn't spend over an hour using it. BUT I got charged for downloading the 23 GB at $0.03 per GB. That's $30 per TB (roughly)! Later I found the same instance at the download/upload rate is $27 per TB.

1. Main issue is visibility in UI. Rent price is visible. But download and upload rate is not! It's like reading a EULA when you just want to use the software.

2. I've checked with other instances about the download/upload pricing. Even data center instances of an RTX PRO 6000 that cost $1.20 charge less than $2 per TB.

I feel like I was scammed.

Built the first version of https://stratuspilot.io and would love some honest feedback from folks here.

The idea is pretty simple: help figure out whether a model will actually fit on a GPU and compare available options across providers without having to manually calculate VRAM requirements or jump between marketplaces.

Still very early and I'm trying to understand if this solves a real problem or if I'm missing the mark entirely.

If you have a couple of minutes, I would really appreciate any feedback: https://stratuspilot.io

What would make a tool like this genuinely useful in your workflow?

I’m researching the Vast.ai GPU marketplace, but the Market Stats page is only available to hosts with an active machine. (I’m traveling so can’t set myself up).

Would anyone be willing to share a few screenshots of the dashboard, especially the GPU pricing, supply/demand, trends, or location views? Please redact any of your personal or account-specific information ofc.

I’m only looking for the aggregate market data and general layout. Thanks!

hi all, i normally use vast to do image generation on webui and today while trying to rent a machine, all of them but one gave me a 502 bad gateway error when i tried to actually launch webui from the vast portal? does anyone know why this is? is this a problem with vast? i don't know the actual technicalities behind how GPU hosting and renting works since i'm just an end user, thanks