Nucleus is Terramind's AI-native IDE — a desktop editor with PR review, security audit, automations, and 100+ models built in. It runs Atlas (our agent), Claude Code, and Codex as siblings, so you pick per task instead of being locked to one runtime.

How does it compare to Claude Code?

Claude Code is a single-provider CLI that needs a Pro sub to run. Nucleus runs Claude Code on your Pro sub at no extra cost, and adds Atlas, Codex, review, security, automations, and Agents chat in the same $20 Plus plan.

Which models run in the editor?

The model of your choice, from a catalog of 100+ — Claude, GPT, Gemini, Grok, DeepSeek, Llama, and more. Carbon and Helium, Terramind's in-house models, are coming soon to run natively in-editor.

How does the in-editor security audit work?

Hundreds of AI auditors run in parallel against your repo, prove which exploits are real, rank them P0 to P2, and patch in-editor without leaving the file. Runs locally and privately — your code never leaves your machine.

What automations are supported?

Triggers: PR opened, Issue opened, CI failed, Sentry error, daily cron, weekly cron. Outputs: PR comment, auto-fix PR, Sentry resolved, standup digest, release notes, inbox.

macOS is shipping today. Windows and Linux are on the waitlist. Download at terramind.com/nucleus/downloads.

Nucleus

NUCLEUS VS CLAUDE CODE

Claude Code runs Claude. Nucleus runs Claude Code.

Bring your Claude Pro and Nucleus runs Claude Code on it — alongside Codex on your ChatGPT Plus and Atlas, our own agent. Auto review on commit, repo-wide audit, assets that land in the codebase — a self-improving codebase for $20.

Download Nucleus See the proof

TL;DR

Inside the Claude app, the runtime is Claude only. Inside Nucleus, Claude Code is one of three — running on the same Claude Pro you already pay — plus auto review on commit, repo-wide audit, and a chat product.

At a glance

Same bill. Whole stack.

Claude Code

Nucleus Plus

Price

Bundled in Claude Pro ($17–20 / mo)

$20 / mo

Runtimes

Claude only

Nucleus's own + Claude Code + Codex

Use your Claude / OpenAI sub

Claude only

Both — no inference markup

PR review

Ask Claude in the diff

Pre-commit in editor + GitHub PR reviews

Whole-repo security audit

—

Multi-stage investigation pipeline

Asset generation in repo

—

Image · video · 3D — lands natively in your project

Automations

Hooks + agents + `CLAUDE.md` (DIY)

Outcome-driven templates, scheduled

Triggers

—

Slack · Telegram · WhatsApp · GitHub · Sentry

Bundled chat + creative suite

Claude (chat only, Anthropic)

Agents + Studio (multi-provider)

The four pillars

One bill. Four reasons.

01·BEAUTIFUL

The CLI describes the asset. Nucleus drops it in.

Claude Code is a terminal — it can describe an image, not render one. Ask Nucleus for a hero image, a 6-second clip, a marble Atlas GLB and Studio runs inside the agent shell, drops the file into the right folder, and wires it into the right component. No second tab, no copy-paste, no terminal preview hack.

Inline · in-repo · ready to commit.

Generated natively in Nucleus.

02·MOST AFFORDABLE

Use your existing Claude subscription. Get started in Nucleus for free.

Claude Code is $20 — bundled in Claude Pro, but it's a CLI. You still need an IDE, a PR reviewer (CodeRabbit), a SAST scanner (Snyk), and an asset generator (Midjourney) to ship a real product. The full kit starts at ~$99/mo and balloons into the $1,000s once real usage kicks in. Nucleus plugs into the Claude sub you already pay; that subsidy carries the inference straight through — no markup, no per-token tax. The IDE is free, and the $20 Plus tier bundles everything else.

BYO sub · no markup · no per-token tax

MONTHLY COST · USD

PRICE / MONTH

$3000

$1500

$0

$20

$0

FREE

$99

$20

Claude Code

CLI · Claude Pro $20

Nucleus

IDE + Claude Pro

Claude Code stack

+ CodeRabbit + Snyk + Midjourney

Nucleus stack

everything · one bill

One sub you already pay → the IDE is free. Everything else, $20.

03·SAFEST

AI ships 10× faster. And 10× more vulnerabilities.

AI codegen has us shipping 10× faster — and quietly producing 10× more vulnerabilities. Claude Code can be asked to review in the CLI — but it ships no diff-review surface, no whole-repo audit, no inline guard. Nucleus adds three layers — PR review, multi-stage security review, plus an in-app review as you write.

Three layers · PR + security + in-app · subscription-included.

WHERE THE VULNERABILITIES DIE

01 · 100

Issues from AI codegen

Baseline · 10× human rate

02 · 45

After PR review

Catches diff-level bugs

03 · 12

After security review

Whole-repo AI audit

04 · 3

After in-app review

Inline as you write

Claude Code~all reach production

NucleusSurvivors get hunted

Claude Code ships zero review surfaces. Nucleus ships three — PR + security + in-app.

See review in action See security investigation

04·MOST POWERFUL

Self-improving. Any event in. Any output out.

A trigger fires — a PR opens, a Sentry spike, a 9 a.m. cron. A Nucleus agent spins up in a cloud sandbox, works the brief, and an output lands. Claude Code ships hooks, subagents, and `CLAUDE.md` — all of which work, all of which are config-file engineering. Nucleus wires events to outcomes — every result lands in one inbox.

Any event → any agent → any output. One inbox.

See Automations

EVENT → AGENT → OUTPUT

PR opened

Issue opened

CI failed

Sentry error

Daily · 9:00 AM

Weekly · Friday

PR review comment

Auto-fix PR

Sentry resolved

Standup digest

Release notes

Unified inbox

Claude CodeHooks + CLAUDE.md

NucleusAny event → any output

Claude Code ships config files. Nucleus ships event-driven outcomes.

One Subscription. Self Improving Codebase.

TRIGGER FROM

GitHub

Sentry

Slack

GitHub

Sentry

Slack

GitHub

Sentry

Slack

Who switches, honestly.

Stay where you are

Stay on Claude Code if Claude is the only model you want, the CLI or in-Claude-app view is enough, and you don't need PR review or security audit in the same product.

Switch

Switch to Nucleus if