AI · alternatives · 2026
24 alternatives to Siml.ai
Software platform for AI-driven physics simulations
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Siml.ai launched in 2023; newer entries below may have overtaken it.
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SimplAI▲590Build High-Accuracy, Complex Enterprise-Grade AI Apps
2025 · simplai.ai · its alternatives →
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- 3CM
2020 · cml.dev · its alternatives →
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- 7AP
Hey, Jared Palmer (creator of this playground) here. Really excited to ship this. I’ve been building this over the past few weeks to compare LLMs from different providers like OpenAI, Anthropic, Cohere, etc. At Vercel, I manage our Frameworks division (including Next.js, Svelte, and Turbo) and wanted to also dogfood some of the latest features in a slightly larger application. This playground takes a lot of inspiration from https://nat.dev and is built on Tailwind, ui.shadcn.com, and some upcoming Vercel products we’re announcing soon. We’re going to continue adding models to…
2023 · play.vercel.ai · its alternatives →
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Host LLMs across devices sharing GPU to make your AI go brrr
Oct 2025 · github.com · its alternatives →
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Gradient Bang▲173Massively multi-player game played by talking to an LLM
May 2026 · gradient-bang.com · its alternatives →
- 13
RL-training an AI agent to RL-train AI agents. Contribute to Danau5tin/ai-trains-ai development by creating an account on GitHub.
Jul 2026 · github.com · its alternatives →
- 14TB
After training calculator agent via RL, I really wanted to go bigger! So I built RL infrastructure for training long-horizon terminal/coding agents that scales from 2x A100s to 32x H100s (~$1M worth of compute!) Without any training, my 32B agent hit #19 on Terminal-Bench leaderboard, beating Stanford's Terminus-Qwen3-235B-A22! With training... well, too expensive, but I bet the results would be good! *What I did*: - Created a Claude Code-inspired agent (system msg + tools) - Built Docker-isolated GRPO training where each rollout gets its own container - Developed a multi-agent…
2025 · github.com · its alternatives →
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ParallaxPro▲95AI tool that turns your prompts into real video games
Apr 2026 · parallaxpro.ai · its alternatives →
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- 17AA
Hey HN, I wanted to share a new project we've been working on for the last couple of months called ART (https://github.com/OpenPipe/ART). ART is a new open-source framework for training agents using reinforcement learning (RL). RL allows you to train an agent to perform better at any task whose outcome can be measured and quantified. There are many excellent projects focused on training LLMs with RL, such as GRPOTrainer (https://huggingface.co/docs/trl/main/en/grpo_trainer) and verl…
2025 · github.com · its alternatives →
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- 19AI
Jan 2026 · github.com · its alternatives →
- 20RL
Hello Hacker News! We're Yangqing, Xiang and JJ from lepton.ai. We are building a platform to run any AI models as easy as writing local code, and to get your favorite models in minutes. It's like container for AI, but without the hassle of actually building a docker image. We built and contributed to some of the world's most popular AI software - PyTorch 1.0, ONNX, Caffe, etcd, Kubernetes, etc. We also managed hundreds of thousands of computers in our previous jobs. And we found that the AI software stack is usually unnecessarily complex - and we want to change that. Imagine if you are a…
2023 · lepton.ai · its alternatives →
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AI-powered app development and deployment
2025 · cosmicjs.com · its alternatives →
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EddyOwl▲79Empowering Educators with AI-Driven Grading and Analytics
2025 · eddyowl.com · its alternatives →
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- 24CA
2024 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →