Claude now reads 200,000 tokens at once — that changes more than you think

Anthropic expanded Claude's context window to 200K tokens. That's roughly 150,000 words in a single request — an entire codebase, a full legal dossier, or five years of quarterly reports.

What 200K means

• A 300-page legal contract with room to ask questions about it
• Entire software repository for analysis
• Multiple years of financial filings in one query

GPT-5 also offers 200K. Gemini pushes to 1M. But Anthropic prioritises recall accuracy — 98% retrieval at 200K.

Enterprise use cases

1. Contract analysis. Upload entire agreements. Ask cross-reference questions.
2. Code review at scale. Feed entire feature branches. See dependencies.
3. Due diligence. Full SEC filings in one pass.

What to do

Test whether a single 200K pass beats your multi-pass or RAG pipeline. Often it does — and implementation is dramatically simpler.