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Anthropic Launches Claude 4 with Breakthrough Constitutional AI Alignment
Saturday, April 4, 2026
Anthropic has officially released Claude 4, marking a significant leap in AI alignment research. The model features an advanced Constitutional AI framework that allows it to reason about and refuse harmful requests with far greater nuance. Claude 4 also introduces a 500K context window and excels at multi-step agentic tasks, outperforming previous models on SWE-bench and GPQA benchmarks.
Key Takeaways
- 500K token context window, double the previous generation
- New Constitutional AI v3 alignment framework
- Top scores on SWE-bench and GPQA Diamond benchmarks
- Available via API and consumer products immediately