Claude AI is the family of large language models built by Anthropic, and in 2026 it is one of the two or three most capable AI systems you can actually use. The current flagship, Claude Opus 4.8, scores 88.6% on the SWE-bench Verified coding benchmark, and the newest model, Claude Sonnet 5, brought that near-flagship quality down to $2 per million input tokens. Claude is known for careful reasoning, strong coding, a huge 1 million token context window, and a safety-first design its maker calls Constitutional AI. This guide is the plain-English tour of everything that matters about Claude AI: who makes it, the full 2026 model lineup and what […]