Anthropic Launches Claude Sonnet 5 With Near-Opus Performance at a Lower Price
Anthropic says the new medium-sized model can plan, use tools and run autonomously, while matching near-Opus performance at lower cost.
- On Tuesday, June 30, 2026, Anthropic released Claude Sonnet 5, a mid-tier AI model designed to deliver near-flagship performance at significantly lower cost than its Opus 4.8 counterpart.
- Designed to be its "most agentic Sonnet model yet," Sonnet 5 can make plans, use tools like browsers and terminals, and run autonomously at capabilities that previously required larger, costlier systems.
- Performance benchmarks show Sonnet 5 approaches Claude Opus 4.8, scoring 63.2% on agentic coding tests versus 69.2% for Opus 4.8 and 58.1% for the predecessor Sonnet 4.6.
- Anthropic reports Sonnet 5 demonstrates lower rates of hallucinations and "undesirable behaviors" than Sonnet 4.6, though the company noted cybersecurity capabilities remain intentionally below Opus-class systems.
- Introductory pricing of $2 per million input tokens and $10 per million output tokens holds through August 31, 2026, after which standard rates increase to $3 and $15 per million tokens.
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IT Security News - cybersecurity, infosecurity newsClaude Sonnet 5.0 heads straight down the middle of the road to dodge controversy
Anthropic has released the latest version of its mid-sized model, Sonnet 5, which the company claims is its most “agentic” yet. For developers writing agents to automate tedious and recurring tasks, Sonnet 5 promises improved capabilities in reasoning, tool use, coding, and knowledge work. This version is also less likely to pull embarrassing (for Anthropic) gaffes of misunderstanding, so the company asserts. “Our safety assessments found that S…
That's Sonnet 5, Anthropic's new AI model, with maximum efficiency for agents and daily tasks
Claude Sonnet 5 is here, and the 'most agentic Sonnet model yet' shows that the AI war is shifting from chat to agents
Anthropic has released Claude Sonnet 5, calling it its “most agentic Sonnet model yet”The new model is designed to make plans, use tools like browsers and terminals, and run more autonomouslySonnet 5 is available across Anthropic plans, and is now the default model for Claude Free and Pro usersAnthropic has released a new version of Claude, called Sonnet 5, which it’s calling “the most agentic Sonnet model yet.” Agentic models are designed to do…
Anthropic's Claude Sonnet 5 Is "Near-Opus Intelligence" For All Plans
Anthropic releases their new Sonnet 5 as the default model for all plans, including the free tier, plus introductory pricing on tokens. The post Anthropic’s Claude Sonnet 5 Is “Near-Opus Intelligence” For All Plans appeared first on Search Engine Journal.
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