Sonnet 4.6 and chat compaction for compliance

ISMS Copilot uses Claude Sonnet 4.6 in Fast mode and Claude Opus 4.6 in Think mode. These models power the platform's compliance reasoning, delivering accurate control mappings, policy generation, and gap analysis for ISO 27001, SOC2, GDPR, and other frameworks.

Sonnet 4.6 improvements for compliance

Claude Sonnet 4.6 brings significant enhancements for compliance work:

• 1M token context window — analyze up to ~1,500 pages or multiple large documents in a single conversation

• Superior reasoning — nuanced analysis of complex requirements like ISO 27001 Annex A controls and SOC2 trust principles

• Zero control fabrication — tested extensively to eliminate hallucinations on framework controls and audit requirements

• Audit-ready outputs — structured responses suitable for compliance documentation and auditor review

These improvements make Sonnet 4.6 reliable for iterative compliance tasks like multi-control mapping, policy refinement across versions, and detailed gap analysis.

How chat compaction works

Chat compaction keeps long compliance conversations accurate by intelligently summarizing older messages when threads approach ~150,000 tokens (roughly 75-100 exchanges). This feature is available in Think mode only.

The encrypted compaction workflow:

1. When your conversation nears the token limit, ISMS Copilot automatically triggers compaction

2. An amber banner appears: "Compacting our conversation so we can keep chatting…"

3. The system summarizes older messages (3-8 seconds), preserving key compliance details like control references, gaps identified, and policy decisions

4. Recent exchanges remain unchanged with full context intact

5. The conversation resumes, enabling indefinite threads for iterative compliance work

All compaction happens server-side with end-to-end encryption. Your data stays in EU-hosted infrastructure (Frankfurt) and is never used for AI training.

Resetting context for new topics

To start fresh when switching compliance topics or frameworks:

• Start a new conversation — recommended for new projects, frameworks, or unrelated compliance questions. This gives you a clean context window.

• Use "Reset thread" — if a conversation stalls (no updates for 2+ minutes), click the "Reset thread" button to clear timers and fetch fresh messages. This doesn't delete history, only resets the connection.

For Fast mode (no compaction), new conversations are required when you reach the 300,000 token limit on the free tier.