An IDE with an AI agent that edits your code.
A free IDE. You pay only for the neural network — not a ChatGPT or Claude subscription.
from fastapi import FastAPI, Dependsfrom .auth import require_user app = FastAPI(title="Sirius") @app.get("/me")async def me(user = Depends(require_user)): return {"id": user.id, "plan": user.plan}What the agent actually does
Three concrete capabilities, with real code — not marketing screenshots.
01
Edits files
Sirius AI reads your project, proposes a diff, and applies it. You approve every change.
# auth.py — Sirius proposed patch
-def login(user, pw):
- if user.pw == pw:
- return True
- return False
+def login(user, pw):
+ if not user or not user.hashed_password:
+ return False
+ return bcrypt.verify(pw, user.hashed_password)02
Runs the terminal
Install, build, test, git — dangerous commands require explicit confirmation.
$ pytest -q
............................................
✓ 42 passed in 1.8s
$ git status
On branch agent/fix-auth
modified: auth.py
$ git commit -am "auth: use bcrypt"
[agent/fix-auth 8e1f2d4] auth: use bcrypt
1 file changed, 4 insertions(+), 3 deletions(-)03
Understands the whole project
Reads, indexes and reasons across 100k+ tokens of context — not just the open file.
# Sirius indexes the whole project
> find duplicate logic in auth/
found: 3 places where bcrypt.verify is reimplemented
recommend: extract auth/passwords.py::verify_password
apply patch? [y/N]Why Sirius
Honest comparison. No fake stars or 'trusted by Google' logos.
| Cursor Pro | Claude Pro | Sirius Plus | |
|---|---|---|---|
| Price / month | $20 | $20 | $15 |
| IDE included | $20 (with sub) | — | Free |
| AI agent | Yes | No | Yes |
| Edits files | Yes | No | Yes |
| Terminal access | Yes | No | Yes |
| Models | GPT / Claude | Claude only | ChatGPT, Claude, Codex |
| Pays in crypto | No | No | Yes |
Sirius IDE pricing
The IDE is free. You pay only for the AI agent. The limit is in AI credits — each call costs the real OpenRouter price of its tokens, so heavy models drain faster.
Free Trial
3k credits
50 AI requests (one-time)
Full IDE, basic agent access to try things out.
- Full IDE forever
- Basic AI agent
- Email support
Plus
≈ 1 490 ₽
98k credits
98,000 AI credits / month
Entry plan for everyday coding sessions.
- Full IDE
- All models — automatic routing
- Top-up available
- Email support
Pro
≈ 3 490 ₽
321k credits
321,000 AI credits / month
Main plan for active development.
- Full IDE
- All models — automatic routing
- “Max quality” button
- Top-up available
Ultra
≈ 9 890 ₽
1.0M credits
1,032,000 AI credits / month
Power tier: premium reasoning models, the largest pool, top priority.
- Full IDE
- Premium reasoning models — Opus 4.7, o3, GPT-5.2-codex
- “Max quality” always on
- Top priority queue
- Top-up available