Anthropic unveiled Claude Opus 4 and Claude Sonnet 4 on May 22, claiming that Claude Opus 4 is its most powerful model yet, “and the world’s best coding model,” while Claude Sonnet 4 is a significant upgrade from its predecessor, “delivering superior coding and reasoning.”The firm added that both upgrades are hybrid models offering two modes — “near-instant responses and extended thinking for deeper reasoning.”Both AI models can also alternate between reasoning, research and tool use, like web search, to improve responses, it said. Anthropic added that Claude Opus 4 outperforms competitors in agentic coding benchmarks.
It is also capable of working continuously for hours on complex, long-running tasks, “significantly expanding what AI agents can do.” Anthropic claims the chatbot has achieved a 72.5% score on a rigorous software engineering benchmark, outperforming OpenAI’s GPT-4.1, which scored 54.6% after its April launch. Claude v4 benchmarks.
Source: Anthropic Related: OpenAI ignored experts when it released overly agreeable ChatGPTThe AI industry’s major players have pivoted toward “reasoning models” in 2025, which will work through problems methodically before responding. OpenAI initiated the shift in December with its “o” series, followed by Google’s Gemini 2.5 Pro with its experimental “Deep Think” capability.
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Author / Journalist: Cointelegraph by Martin Young
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