Zencoder + Claude Sonnet 4.5: Raising the Bar for AI Software Agents


Today, Anthropic launched Claude Sonnet 4.5 — its most powerful model yet for real-world agents, coding, and complex workflows. We are excited to make it immediately available in Zencoder.

In our extensive pre-launch testing, we observed:

  • Smarter, longer-running agents: Our Zen Agents powered by Sonnet 4.5 handled hours-long migrations and feature implementations with greater stability and reliability.
  • Enterprise-grade expertise: Sonnet 4.5 is better at instruction following and context management. Combined with Multi-Repo understanding, our agents are delivering record levels of accuracy and speed across Fortune 500 codebases.
  • Improved performance. On our internal benchmarks, Sonnet 4.5 already shows a significant 23% improvement in speed compared to Sonnet 4. We continue to optimize the agentic harness to get the full potential of the new model.

Why it matters:

  • For developers, it means less time debugging and more time building.
  • For enterprises, it means higher ROI from AI adoption and lower operational risk.
  • For the market, it highlights how quickly AI is evolving—and how Zencoder ensures those leaps translate into production-ready value.

With Claude Sonnet 4.5 + Zencoder’s Multi-Repo Understanding + Zen Agents, the future of AI-powered development is here—and it’s raising the bar.

About the author
Andrew Filev

Andrew Filev

Andrew Filev is founder & CEO of For Good AI. He transformed collaborative work management by founding Wrike (20k+ customers, sold for $2.25B). His passion for AI and innovation continue to shape the future of work. Featured in Forbes & The NY Times, he was EY Entrepreneur Of The Year Finalist & Bay Area News Group 40 Under 40 nominee.

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