Leave ChatGPT while keeping everything it learned about you
Switching LLMs means losing years of context. Anthropic's Import Memory official prompt extracts ~40 stored facts: about 2% of what's in your conversations. Hermit processes your full ChatGPT data export and generates one structured profile per ChatGPT project and recurring theme, with temporal awareness (ACTIVE vs PAST). Ready-to-paste files for Claude Memory, Claude Projects, Gemini Gems, or any LLM. Free analytics. One-shot pricing, not a subscription. Data deleted within 24h.
Hey PH! I'm JK - builder based in Paris, working on tools that preserve memory and context, whether it's family stories before they disappear (Tirith) or AI context across platforms (Hermit).
I switched from ChatGPT to Claude after 3 years and 1258 conversations. The hardest part wasn't finding a better model - it was trying to manually migrate my context, and ended up losing most of it. Three years of projects, preferences, working style, personal context - gone the moment you switch.
Anthropic just launched the Import Memory feature, with a prompt to paste into Chatgpt. It's a great first step, but it only transfers what ChatGPT stored in memory: about 40 flat facts. My dental whitening schedule from 2024 made the cut. Some current projects didn't.
So I built Hermit. It processes your full conversations.json export through a multi-model Anthropic pipeline and generates:
→ A global behavioral profile (who you are, how you work, how to challenge you)
→ A 6-month current snapshot (active priorities, not ancient history)
→ Up to 25 topic deep-dives, one per ChatGPT project and recurring conversation theme
→ A ready-to-paste Claude Memory Import file (~47% of the 75K capacity vs ~10% from the native prompt)
→ 25 enriched memory bullets for Memory Edits
→ Output files compatible with Claude Projects, Gemini Gems, and any LLM that accepts system prompts
One tricky problem: LLMs have no concept of time. "User works at Notion" when you left a year ago. "User is apartment hunting" when you moved in 8 months ago. That's not hallucination - it's broken context.
Hermit's pipeline calculates recent activity for each theme and applies ACTIVE/PAST labels to fix this.
The free tier gives you full analytics on your ChatGPT history: conversation count, token stats, topic clustering, ChatGPT project detection. Genuinely useful on its own.
Full profiles: €19.90 one-shot. Not a subscription.
Code PRODUCTHUNT for 25% off during launch week.
On privacy: only conversation excerpts are sent to the Anthropic API (zero-retention policy, nothing stored, nothing used for training). Everything auto-deleted within 24h. No human ever sees your data. I built Hermit to migrate my own 1k+ conversations, including health stuff and personal things I would never share publicly. I wouldn't use a tool I didn't trust with my own data.
Built with Next.js 15, Supabase, Tailwind v4, Inngest, and Stripe. The pipeline is 100% Claude-powered.
🐚 Shed your shell. Keep the soul. 🦀
