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Life & fun · alternatives · 2026

24 alternatives to I used Claude Mythos to build my startup in 1 day

This sounds clickbait, but it’s true: I used Claude Mythos to build the full site in 1 day. Then Anthropic removed the model, so I had to go back to Opus.

This is a personal account of how a developer built an entire startup website in one day using Claude Mythos, an AI model from Anthropic. When Anthropic discontinued the model, the developer had to migrate the project… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1

    Claude Opus 4.7 is Anthropic's most capable generally available model, released April 16, 2026. It outperforms Opus 4.6, GPT-5.4, and Gemini 3.1 Pro on key benchmarks including agentic coding, multidisciplinary reasoning, scaled tool use, and agentic computer use. It is benchmarked below Claude Mythos Preview — which remains restricted to Project Glasswing partners. https://vucense.com/ai-intelligence/ai-tools/claude-opus-4-7...

    2025 · anthropic.com · its alternatives →

  2. 2

    Claude can now connect to your world

    2025 · claude.com · its alternatives →

  3. 3

    Put Claude Code tasks on autopilot with smart routines

    Apr 2026 · anthropic.com · its alternatives →

  4. 4
    Viberia▲146

    Hey HN, This is my take on the agent harness. Everything on an isometric map. Agents are grouped into "buildings" that run in a sequence or a loop; e.g., the CodeForge has an agent that writes a PRD, another one that implements, and a third that reviews. Everything is customizable, you build your own buildings/teams however you want. It's a Tauri app, really light (about 8x less energy than the closest competitor I benchmarked, so it actually runs from a coffee shop on battery). It's macOS only for now, but ping me if you are willing to test the Windows or Linux version. I've been…

    May 2026 · getviberia.com · its alternatives →

  5. 5
    AlliHat▲96

    I think we all have a similar flow and pain with browsers and AI. Copy article, paste in Claude tab, come back to article, back to Claude, in circles we go. Anthropic has a Chrome extension, but my daily driver is Safari. So I made my own extension. It's not a clone as I've never used the Chrome version. One obvious change: the Chrome version I believe uses Chrome "request sidebar" thing. And Safari doesn't have that, so had to inject the sidebar right in the site html itself. There's been some fun things in here like figuring out the sidebar html/css sandboxing. Also there's an agent…

    May 2026 · allihat.com · its alternatives →

  6. 6

    Hey HN. I built this because my Anthropic API bills were getting out of hand (spoiler: they remain high even with this, batch is not a magic bullet). I use Claude Code daily for software design and infra work (terraform, code reviews, docs). Many Terminal tabs, many questions. I realised some questions are ok to wait on and with that comes some cost savings. So here is a small MCP that lets you send work directly to Anthropic's Batch API from inside Claude Code, for the same quality responses just 50% cheaper, results come back in ~30min-1hr. How it works: you type /batch review this…

    Feb 2026 · github.com · its alternatives →

  7. 7
    Audryo▲70

    Audryo is agent-first infrastructure for lifecycle email. Instead of adding AI to a canvas tool, it starts from the API: one set of endpoints powers the app, an MCP server, a CLI, and agent skills. Claude Code, Codex, or Cursor can build audiences, journeys, campaigns, and brande

    24d ago · audryo.com · its alternatives →

  8. 8

    Boris Cherny (Claude Code creator) recently dropped a threads on how his team at Anthropic uses Claude Code. The key insight: they don't treat it as a static config. After every correction, they tell Claude "Update your CLAUDE.md so you don't make that mistake again." Claude writes a rule for itself. They review it, commit it to git. The mistake never happens again. I cross-referenced his tweets with Anthropic's official docs and other best practices for CLAUDE.md and then packaged it into a starter kit: - Fill-in-the-blank templates for Next.js/TypeScript, Python/FastAPI, and a…

    Feb 2026 · github.com · its alternatives →

  9. 9

    I got frustrated with Claude's official platform limitations - conversations disappearing, no customization options, and clunky file handling. So I built my own interface over a weekend! GitHub: https://github.com/chihebnabil/claude-ui What it does: - Saves all conversations locally (SQLite + Drizzle ORM) - Lets you customize Claude's personality per chat - Handles file attachments properly + caching input tokens - Dark/light mode - No conversation limits - Markdown & code syntax highlighting Tech stack is pretty simple: - Nuxt 3 for the frontend - Anthropic's SDK…

    2024 · github.com · its alternatives →

  10. 10

    Hey HN. I built an AI agent harness over the past few months and I'm open sourcing it today. Some context on why. I've been building with Claude Code daily using this harness. It orchestrates multiple AI agents as a team, with a dashboard, chat, kanban board, the works. I used it to build a full SaaS product (MyUpMonitor, https://myupmonitor.com) in about 24 hours of focused coding. Then yesterday Anthropic announced Mythos and decided to keep it behind closed doors. Meanwhile I'm paying for Claude and I can't access their best model. I don't think that is nice at all... So I'm…

    Apr 2026 · github.com · its alternatives →

  11. 11
    Bleenk▲41

    I kept running into the same issue whenever starting a new project: the setup phase consumed more time than the actual feature work. Preparing boilerplate, restructuring directories, performing refactors, resolving dependency conflicts, and wiring framework logic consistently took hours before I could write meaningful code. Even with modern tooling, the early-stage workload was nearly identical across projects. To remove that bottleneck, I built Bleenk, an AI coding agent that operates directly on real repositories. Instead of generating isolated snippets, it performs multi-step…

    Jan 2026 · bleenk.app · its alternatives →

  12. 12

    Hey everyone, I’m the maintainer of the popular screenshot-to-code repo on Github (46k+ stars). When Claude Opus was released, I thought to myself what if you could send in a video of yourself using a website or app, would the LLM be able to build it as a functional prototype? To my surprise, it worked quite well. Here are two examples: * In this video, you can see the AI replicating Google with auto-complete suggestions and a search results page (failed at putting the results on a separate page). https://streamable.com/s24pq6 * Here, we show it a multi-step form…

    2024 · github.com · its alternatives →

  13. 13

    At AI week, Gian Segato mentioned that people inside Anthropic keep their own personal eval for Claude: a small, private test they trust more than any leaderboard. That idea stuck with me, so I built mine out of the thing I trust my own taste on most: Charlie Parker solos.

    2022 · flatnine.co · its alternatives →

  14. 14EA

    I built an artificial life simulator that fits in one HTML file (~1400 lines ~50KB) with Claude Opus 4.6, interestingly, I didn't even ask it to build the game itself, I've requested to create the software that didn't exist before and not use any dependencies, third-party libraries or ask questions. Firstly Opus 4.6 made photoshop clone that barely worked, but had nice and neat UI with all common features for the image editor, then I've called that crap and asked to really build someting that wasn't there, it made Emergent there. Please check it out and tell what you think, of course it's a…

    Feb 2026 · emergent-ivory.vercel.app · its alternatives →

  15. 15

    I built a collection of professional slash commands for Anthropic's Claude Code that provide structured workflows for common software development tasks. These commands are directly inspired by and adapted from Anthropic's own claude-code-best-practices (https://www.anthropic.com/engineering/claude-code-best-practices) documentation, translating their recommendations into executable workflows. The suite includes commands for: • Comprehensive code reviews with security and performance analysis • End-to-end feature development with planning, implementation, and testing •…

    2025 · github.com · its alternatives →

  16. 16UC

    Anthropic recently released a new model called Claude. As I was unable to access this model, I noticed a lot of discussions on Twitter regarding comparisons and use cases of Claude and ChatGPT. To keep track of these conversations, I created a repository that compiles information on the following topics: * Comparisons between Claude and ChatGPT * Use cases * Limitations of Claude Check it out and please create a bug/PR if more threads can be added: https://github.com/taranjeet/awesome-claude

    2023 · its alternatives →

  17. 17

    Artificial Intelligence models, advanced

    Apr 2026 · capybara.com · its alternatives →

  18. 18

    Anthropic's usage analytics dashboard is only available to Team and Enterprise org admins. On a Pro or Max plan all you get is /usage and the claude.ai usage page, which show where you stand right now but not where you're heading. I looked at various open-source projects but none quite matched what I had in mind: an all-round control panel for Claude Code that's also a single binary, with no dependencies and no install steps. The other thing I cared about was forecasting the usage limits. Existing tools do burn-rate projections (ccusage) or percentile heuristics…

    Jun 2026 · github.com · its alternatives →

  19. 19

    Anthropic ships daily. Startups die weekly. Vent here.

    Mar 2026 · fcukclaude.xyz · its alternatives →

  20. 20
    Craft▲11

    AI-Powered Next.js Framework: Build SaaS in days with Claude

    Oct 2025 · getcraft.dev · its alternatives →

  21. 21PE

    Hey guys, I built this platform out to allow users to passively earn crypto for non-intrusive highly targetted ads. One of the things that's awesome is that there's an option to receive payouts in Anthropic's pre-IPO stock (via PreStocks on Solana). So you can use Claude Code and receive Anthropic stock . Let me know what you guys think. Feedback is welcome and please give it a try to install.

    Aug 2026 · prmpt.cash · its alternatives →

  22. 22

    I've spent the last week trying to squeeze the automation out of Claude Code so that I can just queue tasks and they come out the other end tested, validated and ready to ship. Today I asked Opus 4.6 if we should move to their new team agent system and it said no and suggested that I share what I've done with the world. I took all the good parts from things like Ralph, and GSD and I was able to push it all into CC prompts - so you don't need anything except Claude Code to set this up. The problem I was addressing was that CC was generating way more code than I could validated so I needed…

    Jul 2026 · msolecki.github.io · its alternatives →

  23. 23IB

    Hi HN, I’ve been working on an AI-powered website builder that allows anyone to create a fully functional website in just a few minutes. No coding, no design skills—just a simple, intuitive process with AI handling the heavy lifting. Here’s what you can do with it: • Create a website by entering a name, description, and subdomain. • Use AI to design the site, customize content, and edit sections with simple prompts. • Preview, tweak, and publish your website live instantly. • Download the code for full flexibility if you want to self-host or integrate. It’s still an MVP, and I’ve got lots of…

    2024 · aiwebsitebuilder.tech · its alternatives →

  24. 24

    The complete Claude.ai workflow for one-person businesses

    Jun 2026 · nfcf.gumroad.com · its alternatives →

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