CLAUDE OPUS 4.6 LAUNCHES WITH 1M TOKEN CONTEXT WINDOW — Quick Facts
Anthropic drops Claude Opus 4.6 with 1 million token context, Agent Teams, and PowerPoint integration.
Key Data Points
- First Opus model with 1 million token context window, scoring 76% on needle-in-haystack tests vs 18.5% for Sonnet 4.5
- Agent Teams feature splits coding tasks across multiple AI agents working in parallel, available in research preview for API users
- Found 500+ zero-day vulnerabilities in open-source code during safety testing, raising cybersecurity capabilities to new level
Frequently Asked
- What is Claude Opus 4.6 context window size?
- Claude Opus 4.6 features a 1 million token context window, which is five times larger than previous Opus models and allows it to process entire codebases, legal documents, and research papers simultaneously.
- How does Claude Opus 4.6 perform on needle-in-haystack tests?
- Claude Opus 4.6 scored 76% on the needle-in-a-haystack benchmark MRCR v2, compared to Claude Sonnet 4.5's 18.5%, demonstrating superior fact-finding and reasoning capabilities across long and complex prompts.
- When was Claude Opus 4.6 released?
- Claude Opus 4.6 was announced by Anthropic on Thursday, February 5, 2025, as a direct upgrade to the previous Opus model.
- What is Agent Teams feature in Claude Opus 4.6?
- Agent Teams is a new feature available in research preview for API users that splits coding tasks across multiple AI agents working in parallel, improving efficiency for complex development projects.
- How much does Claude Opus 4.6 cost?
- Claude Opus 4.6 maintains the same pricing as its predecessor at $5 per million input tokens and $25 per million output tokens, despite offering significantly enhanced capabilities.