Claude Code Skill Delegates Coding to Mistral/DeepSeek: 57M Tokens Saved, 90-100% Cost Reduction

Developer pcx_wave posted a detailed breakdown of vibe-skill, a Claude Code skill that delegates coding tasks to cheaper models (Mistral or DeepSeek) while using Claude for planning and review. After 10 days and 254 runs, they saved 57 million tokens and cut costs by 90-100% while maintaining Claude-quality output.

How It Works

Vibe-skill runs inside Claude Code. You type /vibeon <whatever>, Claude decomposes the task and delegates the actual coding to a lightweight model (via the open-source Vibe tool). Claude then reviews the diff and corrects failures. The cheap model handles token-burn; Claude only spends tokens on planning and review.

Results by Model

Model	Tokens Delegated	Actual Cost	Claude Equivalent	Savings
DeepSeek V4 Flash	29M	$4.13	$92.16	95%
Mistral Medium 3.5	28M	$0 (Pro sub)	$84.77	100%

Overall success rate: 98% across 254 runs. When delegation fails, Claude catches and corrects the output.

Token Economics

Mistral tokens are roughly 50% cheaper than Claude's; DeepSeek tokens are 95% cheaper. The author uses a Mistral Pro subscription ($18.36/mo) which includes about 1 billion free tokens. For Mistral Pro subscribers, delegation costs $0 until the quota is exhausted, after which it automatically falls back to DeepSeek (since Mistral PAYG at $1.52/M tokens is 10× more expensive than DeepSeek).

The break-even point: DeepSeek alone is cheaper than the Mistral Pro subscription if you delegate below 131M tokens/month ( $18.36 / $0.14 per M ). Above that volume, Mistral Pro wins with ~10× more headroom before hitting the quota.

Setup

The skill is open source at github.com/pcx-wave/vibe-skill. A similar Gemini skill is also available but less configurable and flaky. To use, clone the repo and load the skill into Claude Code — then just /vibeon your task.