Mirasim Wiki · from build to eval
Mirasim is a One Agent IDE — run your coding agents from anywhere, then let simulated users test what you built. Sign-up is invite-only right now, and an invite code costs nothing: Mirasim runs on the model accounts you already pay for.
This is this wiki's invite code. Mirasim is invite-only — without a code there is no way in. Use it to activate your account for free; you then get a code of your own, and inviting others earns you a paid month.
One Agent IDE — the agent that writes your code and the simulated user that tests it, in the same workbench.
In the usual workflow you write code in one tool, then open the page yourself to check it. Mirasim connects those two ends: coding agents work in parallel inside the workbench, and when a build is ready, simulated users actually use your product in a real browser or a real mobile emulator and bring the first-hand feedback back. These are the core capabilities listed on the official site:
Several projects side by side, each with its own sessions, agents and model configuration — nothing bleeds across.
Run many agent sessions at once, with a VS Code-like editor for quick edits. Works from mobile too.
The same workflow either way: keyboard-driven in the TUI, point-and-browse in the GUI.
The agent reads pages as text structure — roughly 184 B against 60 KB for a screenshot, about 330× less data — driving real Chrome with a real user profile.
Mac apps, the iOS Simulator and the Android emulator answer the same way, so mobile products get tested by simulated users too.
The official figure is about 1k tokens of tool overhead per turn, against roughly 53k for thirty tool schemas — the context stays with the work.
Mirasim is in Alpha; the official wording is "expect rough edges". Once installed, the app keeps itself up to date.
Latest version v0.0.149 · fetched from the official site automatically, updated Aug 9, 2026, 17:12 (GMT+8) · every link points straight at the official CDN
| Package | File | Size | SHA-256 | |
|---|---|---|---|---|
| macOS desktop appmacOS 13+ · Apple Silicon | Mirasim-0.0.149-arm64.dmg | 109.8 MB | Download ⬇ | |
| Command line (CLI)macOS · Apple Silicon | mirasim-darwin-arm64.tar.xz | 53.4 MB | Download ⬇ | |
| Android appAndroid · sideload it yourself | mirasim-0.0.149.apk | 34.3 MB | Download ⬇ | |
| VS Code extensionInstall manually in VS Code | mirasim-0.0.149.vsix | — | — | Download ⬇ |
| ChecksumsTo verify download integrity | SHA256SUMS | 1 KB | — | Download ⬇ |
Verify your download: put SHA256SUMS in the same folder as the package and run the command below. Clicking a SHA-256 value in the table copies it in full.
shasum -a 256 -c SHA256SUMS --ignore-missing
iOS is on TestFlight only; public invites are not open yet. The Android APK has to be sideloaded. The desktop app needs Apple Silicon and macOS 13 or later — there is no Intel Mac or Windows build.
Looking for system requirements, checksums or the Windows situation? The full download page has all of it.
Three steps: install, sign in, activate with an invite code.
Grab the macOS package from the download table and drag it into Applications. If you live in the terminal, take the CLI build instead.
GitHub, Google or email — all three work.
Mirasim is invite-only, so a code has to be redeemed before you can use it. Use MIRA-EC9V-64BF-BC07 (copy it here), then connect your own model account and start working.
The invite code costs nothing, and Mirasim itself runs on the model accounts you already have.
The official wording is "a code costs nothing and runs on your own model accounts": using Mirasim with an invite code is free. Bring the Claude Code or Codex subscription you already pay for, or an API key, and you get those agents plus Mirasim's own agent, the six-pane workbench, MCP servers and plugins — Mirasim charges nothing on top.
If you do buy credits, the models the platform can call directly cover most of the field:
No silent model swaps: the official pricing page states "you get the model you picked". Any turn that fell back is marked as such in the record, and there is a fingerprint method published so you can check for yourself.
Two exceptions: computer use and simulated users spend cloud quota, so they need a paid plan or an API key of your own. Everything else works on a free account.
Invite people who genuinely use Mirasim and the team covers a full month of a paid plan for you.
The rule that matters: sign-ups alone do not count. The people you invite have to actually use Mirasim — sign in, open sessions, do real work — and the team checks. Once you are in, your own invite code lives under Settings → Account; if you have run out, the official Discord hands out more.
You can start today: activate your account with this wiki's code MIRA-EC9V-64BF-BC07 (copy it at the top), then share the code you get. Five real users is a free month of Pro — $89 the team pays instead of you.
Credits pay for calls to the official cloud models, including computer use and simulated users. Run out and you can switch back to your own account and keep working.
| Plan | Monthly | Credits | Roughly | Or invite |
|---|---|---|---|---|
| Basic | $29 | 4,000 credits | ≈50M tokens · 200–400 messages | 3 people = one month |
| Pro | $89 | 20,000 credits | ≈250M tokens · 1,000–2,000 messages | 5 people = one month |
| Max | $199 | 80,000 credits | ≈1,000M tokens · 4,000–8,000 messages | 10 people = one month |
The official comparison: the same usage runs about $40–$400 a month elsewhere (a Claude Code and a Codex subscription each). Per-model credit rates are published. Full details at mirasim.ai/pricing.
The latest 2 entries from the official "Research notes" blog · synced automatically, updated Aug 9, 2026, 17:12 (GMT+8)
Park et al. · Stanford University and Google Research · arXiv:2304.03442 (2023)
Twenty-five language-model characters live in a small sandbox town with memory, reflection and planning wired together. The interesting result is that plausible social behaviour emerges from fairly simple machinery: remember what happened, reflect on it, plan accordingly.
Read the original paper →Wang et al. · NVIDIA, Caltech, UT Austin, Stanford and Arizona State University · arXiv:2305.16291 (2023)
An agent plays Minecraft with no human in the loop and no fine-tuning. It sets its own next goal, writes a program to reach it, checks the result, and keeps the programs that worked in a growing skill library it can call later. The library is the mechanism that matters: capability accumulates as reusable code rather than as a longer prompt.
Read the original paper →As the team puts it, every note is a summary written from scratch — the research is other people's, the commentary is theirs — and each links to the original paper. More at mirasim.ai/blog.
The questions that come up most often.
Yes — with an invite code it costs nothing, because it runs on your own model accounts (a Claude Code or Codex subscription, or an API key). Only computer use and simulated users need paid credits or a key of your own.
No, Mirasim is invite-only for now. Use this wiki's code MIRA-EC9V-64BF-BC07 to activate. After you are in you get a code of your own, and the official Discord hands out more if you need them.
macOS desktop (Apple Silicon, macOS 13+), a macOS command-line build, an Android APK to sideload, and a VS Code extension. iOS is in TestFlight; public invites are not open. There is no Intel Mac or Windows build.
Invite 5 builders who really use Mirasim. Sign-ups alone explicitly do not count — they have to sign in, open sessions and do real work, and the team verifies before granting the month. The same scheme gives one month of Basic for 3 people and one month of Max for 10.
Every file's SHA-256 is listed in the download table (click to copy), or fetch the official SHA256SUMS and run shasum -a 256 -c SHA256SUMS --ignore-missing. All links point at the official CDN (cdn-assets.mirasim.ai); this wiki hosts no packages of its own.
No. This is a community-run wiki with no affiliation to Mirasim. Version numbers, download links and notes are fetched from the official site automatically; mirasim.ai is always the authority. The invite code on this page belongs to the person who runs the wiki.
MIRASIM WIKI