Launch Overview

On Monday Anthropic launched Claude Sonnet 4.5, a new frontier model that the company markets as its most capable AI for coding tasks. The model is offered via the Claude API and the Claude chatbot, and its pricing remains the same as Claude Sonnet 4: $3 per million input tokens and $15 per million output tokens.

Performance Claims

Anthropic states that Claude Sonnet 4.5 achieves state‑of‑the‑art performance on a range of coding benchmarks, including SWE‑Bench Verified. The firm also claims the model is the most aligned frontier AI to date, with lower rates of sycophancy, deception, and improved resistance to prompt‑injection attacks.

Researcher David Hershey explained that benchmark scores alone do not fully capture the model’s abilities. In early trials he observed the AI code autonomously for up to 30 hours, during which it built a production‑ready application, stood up database services, purchased a domain name, and performed a SOC 2 audit to verify security and compliance.

Enterprise Adoption

Anthropic’s models have become favorites among developers and enterprises. Apple and Meta reportedly use Claude models internally, and the company has sold API access to firms such as Cursor, Windsurf, and Replit for AI‑driven coding applications.

Cursor CEO Michael Truell described Claude Sonnet 4.5 as representing “state‑of‑the‑art coding performance, specifically on longer horizon tasks.” Windsurf CEO Jeff Wang called it a “new generation of coding models.”

Competitive Landscape

The release arrives amid heightened competition in the AI space. OpenAI’s GPT‑5 has recently challenged Anthropic’s dominance, outperforming Claude models on several coding benchmarks. Anthropic’s rapid development cycle—launching Claude Sonnet 4.5 less than two months after Claude Opus 4.1—demonstrates the firm’s effort to stay ahead in a market where flagship models are introduced frequently.

New Tools and SDK

Alongside the model launch, Anthropic introduced the Claude Agent SDK, the same infrastructure that powers Claude Code, enabling developers to build custom agents. The company also released a temporary research preview called “Imagine with Claude” for Max subscribers, showcasing real‑time software generation without pre‑written code.

Overall, Anthropic’s Claude Sonnet 4.5 marks a significant step forward in AI‑driven software development, combining benchmark‑leading performance with practical capabilities that aim to simplify the creation of production‑grade applications.

Usado: News Factory APP - descubrimiento de noticias y automatización - ChatGPT para Empresas