Tensai

Browser extension that transfers conversation context between Claude and ChatGPT

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About Tensai

Tensai is a Chrome extension designed to bridge conversations between Anthropic’s Claude and OpenAI’s ChatGPT. It captures conversation turns locally, compresses them, and injects structured context into the paired AI’s draft box when switching tabs. The extension maintains continuity by preserving goals, decisions, open questions, and relevant code while preventing repetition. Users retain full control over what is sent, as Tensai only pre-fills drafts without submitting messages automatically. A live indicator shows the remaining context window space in the current AI, with warnings at 60% and 85% capacity. All captured turns are stored locally in the browser’s session storage and can be exported as JSON or Markdown. The tool operates entirely client-side without requiring accounts, API keys, or network transmission of data.

Key features

Local context compression and storage
Automatic context injection into paired AI draft
Live context window capacity indicator
Session history with export capability
Bidirectional context transfer
Draft restoration after clearing
No automatic message submission
Zero data transmission to external servers

Use cases

Continuing complex coding projects across different AI assistants
Maintaining research threads when switching between reasoning and iteration models
Preserving project context when context limits are reached in one model

Pros

Maintains conversation continuity between different AI models
Operates entirely locally without accounts or API keys
Preserves only relevant context to prevent information overload
Provides visual warnings about context window capacity
Supports bidirectional context transfer between models

Cons

Limited to Chrome and Chromium-based browsers
Requires both AI services to be logged in simultaneously
No support for Firefox or Safari in current version
Context transfer limited by individual AI model constraints

Frequently asked questions about Tensai

What does Tensai do?

Tensai is a Chrome extension that captures conversation turns between Anthropic’s Claude and OpenAI’s ChatGPT, compresses them locally, and injects structured context into the paired AI’s draft box when switching tabs. It ensures continuity by preserving goals, decisions, open questions, and relevant code without repeating information.

Who is Tensai for?

Tensai is designed for users who work across multiple AI models—such as Claude and ChatGPT—and need to maintain continuity in their workflows without manually copying context between conversations.

Does Tensai require an account or API key?

No, Tensai operates entirely client-side and does not require an account or API key. It runs locally within the browser and compresses data without sending it to external servers.

Does Tensai submit messages automatically?

No, Tensai only pre-fills the draft box in the paired AI’s interface. Users retain full control and must manually review and send the message.

Can Tensai work both ways between Claude and ChatGPT?

Yes, Tensai supports bidirectional context transfer, meaning it can capture turns from either AI and inject context into the other, maintaining continuity in both directions.

What happens if one AI reaches its context limit?

Tensai automatically detects when an AI’s context window is nearing capacity and initiates a handoff to the paired AI, transferring key context such as objectives, decisions, open questions, and code before the limit is reached.