Anthropic, the AI company behind the Claude family of models, has positioned itself for a forthcoming initial public offering (IPO) after a pivotal breakthrough late last year. The firm was once playing second fiddle to OpenAI with a lower valuation, but the dynamic shifted in November with the release of Claude Opus 4.5. That update elevated its Claude Code coding agent into what some now call an 'AI killer app.'
Claude Code had been used by developers throughout 2025 to build software, but it showed more promise than truly game-changing results—until Opus 4.5. The new model gave the tool the intelligence to build an app or feature from end to end, based only on plain-language planning and guidance prompts from the user. It also enabled longer-running agents and better planning and execution workflows.
The agent became more adept at discussing a project with an engineer-user, presenting a plan, incorporating feedback, and then carrying out a focused set of multistep tasks to complete a software build. Anthropic further sweetened the deal by imposing fewer usage caps, a significant advantage for software engineers. This combination of improved capability and relaxed limits drove adoption and cemented the product's status.
This development signals that the market for specialized, high-performance coding agents is maturing. Anthropic has found a clear product-market fit with developers willing to pay for a tool that can handle complex, end-to-end software builds. The success of Claude Code is likely the single most important factor driving the company's valuation and its march toward a public listing.
For Anthropic, the path to IPO began not with a funding round or a broad model release, but with a targeted upgrade to a developer tool that solved a concrete problem. It demonstrates how incumbents in the AI race can leapfrog each other by focusing on practical, high-value applications rather than just raw model benchmarks.