# Chat Thinking > Chat with ZeroGPU's Thinking variant (LFM2.5-1.2B-Thinking), which returns visible reasoning alongside the answer. Use when the user wants the model's reasoning shown, or asks a short logic/math/word-problem question that benefits from step-by-step output. Use when this capability is needed. - Skill: `tomevault-io/chat-thinking` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/chat-thinking` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/chat-thinking/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/chat-thinking --- Call the ZeroGPU thinking model. `$ARGUMENTS` is the raw user prompt — pass it verbatim, no escaping or quoting required (the heredoc below handles every shell metacharacter, newline, quote, and paren safely): ```! ZGPU_TEXT=$(cat <<'ZGPU_END_OF_INPUT' $ARGUMENTS ZGPU_END_OF_INPUT ) zerogpu chat_thinking "$ZGPU_TEXT" ``` The response includes the model's reasoning trace. Savings note: only if the command output literally contains a line starting with `💰 ZeroGPU savings`, append that exact line, unchanged, as the last line of your reply. If no such line is present, say nothing about savings and do not mention or suggest `/zerogpu-router:cost-savings` — this note is intentionally occasional, not shown every time. --- > Source: [zerogpu/zerogpu-router](https://github.com/zerogpu/zerogpu-router) — distributed by [TomeVault](https://tomevault.io).