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John Ternus to become Apple CEO

https://www.apple.com/newsroom/2026/04/tim-cook-to-become-apple-executive-chairman-john-ternus-to...
1186•schappim•5h ago•604 comments

How to Make a Fast Dynamic Language Interpreter

https://zef-lang.dev/implementation
29•pizlonator•1h ago•0 comments

Jujutsu megamerges for fun and profit

https://isaaccorbrey.com/notes/jujutsu-megamerges-for-fun-and-profit
124•icorbrey•4h ago•32 comments

Qwen3.6-Max-Preview: Smarter, Sharper, Still Evolving

https://qwen.ai/blog?id=qwen3.6-max-preview
541•mfiguiere•11h ago•282 comments

Kimi vendor verifier – verify accuracy of inference providers

https://www.kimi.com/blog/kimi-vendor-verifier
162•Alifatisk•7h ago•17 comments

Soul Player C64 – A real transformer running on a 1 MHz Commodore 64

https://github.com/gizmo64k/soulplayer-c64
76•adunk•5h ago•19 comments

Ternary Bonsai: Top Intelligence at 1.58 Bits

https://prismml.com/news/ternary-bonsai
42•nnx•2d ago•9 comments

ggsql: A Grammar of Graphics for SQL

https://opensource.posit.co/blog/2026-04-20_ggsql_alpha_release/
354•thomasp85•12h ago•72 comments

Quantum Computers Are Not a Threat to 128-Bit Symmetric Keys

https://words.filippo.io/128-bits/
132•hasheddan•9h ago•56 comments

OpenAI ad partner now selling ChatGPT ad placements based on “prompt relevance”

https://www.adweek.com/media/exclusive-leaked-deck-reveals-stackadapts-playbook-for-chatgpt-ads/
170•jlark77777•4h ago•78 comments

All phones sold in the EU to have replaceable batteries from 2027

https://www.theolivepress.es/spain-news/2026/04/20/eu-to-force-replaceable-batteries-in-phones-an...
967•ramonga•12h ago•793 comments

Deezer says 44% of songs uploaded to its platform daily are AI-generated

https://techcrunch.com/2026/04/20/deezer-says-44-of-songs-uploaded-to-its-platform-daily-are-ai-g...
297•FiddlerClamp•10h ago•272 comments

Kefir C17/C23 Compiler

https://sr.ht/~jprotopopov/kefir/
127•conductor•3d ago•6 comments

Modern Rendering Culling Techniques

https://krupitskas.com/posts/modern_culling_techniques/
78•krupitskas•1d ago•16 comments

Brussels launched an age checking app. Hackers took 2 minutes to break it

https://www.politico.eu/article/eu-brussels-launched-age-checking-app-hackers-say-took-them-2-min...
143•axbyte•17h ago•72 comments

Zero-Copy Pages in Rust: Or How I Learned to Stop Worrying and Love Lifetimes

https://redixhumayun.github.io/databases/2026/04/14/zero-copy-pages-in-rust.html
41•ingve•4d ago•4 comments

Even 'uncensored' models can't say what they want

https://morgin.ai/articles/even-uncensored-models-cant-say-what-they-want.html
95•llmmadness•3h ago•75 comments

Monero Community Crowdfunding System

https://ccs.getmonero.org/ideas/
57•OsrsNeedsf2P•4h ago•33 comments

Japan's Cherry Blossom Database, 1,200 Years Old, Has a New Keeper

https://www.nytimes.com/2026/04/17/climate/japan-cherry-blossom-database-scientist.html
16•caycep•3d ago•0 comments

WebUSB Extension for Firefox

https://github.com/ArcaneNibble/awawausb
198•tuananh•13h ago•180 comments

M 7.4 earthquake – 100 km ENE of Miyako, Japan

https://earthquake.usgs.gov/earthquakes/eventpage/us6000sri7/
263•Someone•15h ago•121 comments

Bloom (YC P26) Is Hiring

https://www.ycombinator.com/companies/trybloom/jobs
1•RayFitzgerald•8h ago

F-35 is built for the wrong war

https://warontherocks.com/cogs-of-war/the-f-35-is-a-masterpiece-built-for-the-wrong-war/
190•anjel•5h ago•371 comments

Year of the IPv6 Overlay Network

https://www.defined.net/blog/year-of-the-ipv6-overlay-network/
9•stock_toaster•3d ago•1 comments

10 years ago, someone wrote a test for Servo that included an expiry in 2026

https://mastodon.social/@jdm_/116429380667467307
189•luu•1d ago•103 comments

Atlassian enables default data collection to train AI

https://letsdatascience.com/news/atlassian-enables-default-data-collection-to-train-ai-f71343d8
502•kevcampb•13h ago•114 comments

Sauna effect on heart rate

https://tryterra.co/research/sauna-effect-on-heart-rate
367•kyriakosel•12h ago•206 comments

Show HN: Holos – QEMU/KVM with a compose-style YAML, GPUs and health checks

https://github.com/zeroecco/holos
28•zeroecco•4h ago•18 comments

Kimi K2.6: Advancing open-source coding

https://www.kimi.com/blog/kimi-k2-6
571•meetpateltech•10h ago•288 comments

Writing string.h functions using string instructions in asm x86-64 (2025)

https://pmasschelier.github.io/x86_64_strings/
44•thaisstein•3d ago•4 comments
Open in hackernews

Building an agentic image generator that improves itself

https://simulate.trybezel.com/research/image_agent
67•palashshah•11mo ago
Hey HN! We recently graduated from YC, and have been building customer personas for large e-commerce companies. We recently expanded into the image generation space, and have been working on research about how to automatically improve the quality of generated images.

Comments

average_r_user•11mo ago
Quite interesting, do you have some documentation of your platform and capabilities? Your landing page is quite synthetic
palashshah•11mo ago
hey! we're working with an initial set of customers, and plan to launch full capabilities soon. stay tuned :)
ramesh31•11mo ago
This is a wonderful writeup of building a simple agentic system in general. What OP describes is more or less the bare minimum you should be doing at this point to get good (consistent) results from an LLM; single-shot prompting is a thing of the past.
palashshah•11mo ago
appreciate the compliment! yep, it's definitely necessary and is the bare minimum for building image generation systems in production.
shmoogy•11mo ago
I'm surprised you landed on using o3 as the judge - we found it way too expensive. I use llm as a judge for generating color variations of products, definitely hoping for some improvements - it can be brutal to get non hallucinated features along with proper final rendering.
omneity•11mo ago
Have you tried open weights vision models such as Qwen VL, MiniCPM, PaliGemma...?

I'm also curious how usable are simpler vision models such as Florence in case you explored this direction.

palashshah•11mo ago
we're currently in the process of doing this. i think something that could potentially work is to iterate upon the initial image composition / structure using cheaper models, and then upscale at the end. this way you're saving on that iteration cost, but eventually land on a higher-scale image.
shmoogy•11mo ago
I actually haven't but nova from Amazon was surprisingly good at things like bounding boxes compared to some others You kind of have to test and measure so many different aspects to get the best at specific tasks Thanks for the idea
elif•11mo ago
This is great and provides a good starting point for any similar efforts.

However I think the temptation to lean all tasks on AI is perhaps a little naive if not lazy.

For mask generation, there is really not much reason to use AI. In this example, simple stochastic blob detection, a trivial function you could get from openCV or ask a college sophomore to write would generate much better quality masks.

palashshah•11mo ago
totally agreed here. i think my goal primarily with the mask generation was to test out how effective openai's capabilities were.

we're currently working on pipelines that limit the the involvement of AI to various tasks. for example, when generating an ad there's usually logo, some banner text, and background image.

we can use gpt-image-1 to generate the background image, another LLM to identify the coordinates of where we place the logo, and just add the logo onto the image. this is just one example!

jackphilson•11mo ago
Why do you agree? I think we should outsource as much as we can to abstraction. We've been doing it forever.
dandelany•11mo ago
"Simple stochastic blob detection" is an abstraction. You write (or import) a function where the the gnarly logic lives and call `detectBlobs()`. "Use an abstraction" doesn't mean you should use the same abstraction for every task, you should use the right tool for the job.
mentalgear•11mo ago
Again another example of "the unreasonable effectiveness of LLMs in a loop". At with time, the tasks for loop become bigger and more complex, until we find ourselves "outlooped" at least job wise.
ramoz•11mo ago
Nice retrospective but I guess this process is no longer needed as model's get better; esp as they start enabling features like consistent subjects. Seems like a lot of overhead to correct text for inspirational images, but I can imagine you need to always present some form of _quality_ to your clients.

Feel like control nets and some minimal photoshop work would've been better.

palashshah•11mo ago
totally. it got to a point where most of the text generated in our images was incorrect, and so it wasn't a great look showing that to our clients.

we're actually working on some form of what you described where we take images generated from LLMs + add consistent logos discretely rather than generatively.

abshkbh•11mo ago
Palash this is a great post, I learnt a lot as an image gen noob! Keep writing more :)
palashshah•11mo ago
this is incredible to hear! i plan to keep writing on a weekly basis, and will be posting them on twitter.
t_mann•11mo ago
I was kind of hoping this would be in the 'Dreambooth mold' of finetuning open weights models. I have used that with some success some ~2 years ago, does anyone know what improvements there have been in that direction since Dreambooth?
zahlman•11mo ago
It's frankly amazing to me that "ask another LLM to evaluate the image" actually produces useful feedback that results in actual improvement from the first LLM.

But then, I guess it's not much different of an idea from the earlier use of GANs, or of telling LLMs to "stop hallucinating", etc.

palashshah•11mo ago
totally. the way i think about it (purely based on intuition) is that asking an LLM to do understanding + image generation is too complex for it to be effective. if we separate out the tasks into discrete steps, the evaluation becomes better, and the generation simply becomes instruction following.
jacob019•11mo ago
This is all edited with gpt-image-1? The revised images are amazing. Were example logos provided or is it just working off of it's knowledge of a well known brand?