Anthropic just dropped Claude Haiku 4.5, a compact AI model that's punching way above its weight class. The new model matches OpenAI's GPT-5 on coding benchmarks while running at a fraction of the cost, becoming the default for Anthropic's free users and the cheapest option for paid subscribers. It's the latest salvo in the AI arms race where efficiency suddenly matters as much as raw power.
Anthropic is rewriting the AI playbook with Claude Haiku 4.5, proving that smaller can actually be better. The company's latest model launch on Wednesday delivers a masterclass in efficiency over excess, matching OpenAI's flagship GPT-5 on coding tasks while consuming far fewer computational resources.
The numbers tell a compelling story. Claude Haiku 4.5 performs similarly to both Claude Sonnet 4 and GPT-5 on SWE-bench Verified, the gold standard for measuring AI coding abilities. But here's the kicker - it does this while being significantly smaller and cheaper than its predecessors. "It punches way above its weight," Mike Krieger, Anthropic's chief product officer, told CNBC in an interview.
The launch timing couldn't be more strategic. Just weeks after announcing Claude Sonnet 4.5 in September and Claude Opus 4.1 in August, Anthropic is maintaining an aggressive release schedule that mirrors the industry's breakneck pace. The company was already training Haiku 4.5 while Sonnet 4.5 was still in development - a sign of how the AI race has evolved into a production pipeline rather than isolated breakthroughs.
For Anthropic's business model, Haiku 4.5 represents a strategic pivot toward accessibility. The model now serves as the default for free users, while paid subscribers get access to what's become the company's most cost-effective option. Haiku models typically cost one-third of Sonnet pricing, while Sonnet models run at one-fifth the cost of Opus models, according to Krieger.
The real innovation lies in how these models work together. Anthropic envisions Claude Sonnet 4.5 creating complex, multi-step problem-solving plans while Haiku 4.5 handles the grunt work - subtasks that require speed over sophistication. "You could have Haiku monitoring financial streams of data, and because it's a smaller, cheaper, faster model, it can do that at a higher volume, then pass off its early insights to Sonnet to do some deeper analysis," Krieger explained.
This collaborative approach addresses a critical enterprise need. With over 300,000 business customers, Anthropic is betting that companies want AI systems that can scale across different use cases without breaking budgets. The model hierarchy - Haiku for speed, Sonnet for balance, Opus for power - mirrors how businesses actually deploy technology: different tools for different jobs.
