Anthropic

Introducing Claude Opus 4.5

Claude Opus 4.5 sets a new standard for coding, agents, computer use, and enterprise workflows. It knows when to pause and think, which means fewer wasted steps and better results. When we gave it our two-hour engineering assignment, it scored higher than any human ever has. We’re excited to see what you build. Learn more: https://www.anthropic.com/news/claude-opus-4-5

Nov 24, 2025·0m·Watch on YouTube ↗

📖 CHAPTERS

1. 1

   Meet Claude Opus 4.5: Anthropic’s “best model yet”

   Sholto, an engineer and researcher at Anthropic, introduces Claude Opus 4.5 and frames it as the company’s strongest model so far. He positions it as leading across coding, agentic work, and common business tasks.

2. 2

   “It just gets it”: Reliability and user trust improvements

   Beyond benchmarkable skills, the speaker emphasizes an intangible but practical improvement: the model’s judgment and understanding. He notes increased personal trust and fewer needs to step in during work sessions.

3. 3

   Real-world engineering wins: Solving tougher bugs

   The transcript highlights anecdotal evidence from teammates: Opus 4.5 can solve bugs that previous models (like Sonnet) struggled to identify. This is presented as a meaningful step up in debugging effectiveness.

4. 4

   Efficiency through better “think-then-act” behavior

   Sholto describes the model as more efficient because it knows when to reason before making changes. This reduces incorrect edits and supports more accurate, targeted interventions in code and tasks.

5. 5

   Benchmark highlight: Two-hour take-home engineering task

   A specific evaluation is mentioned: a two-hour intensive engineering take-home. Claude Opus 4.5 reportedly scored higher than any human has on that task, underscoring strong applied engineering capability.

6. 6

   Better front-end development performance

   The model is described as significantly stronger at front-end work. This suggests improvements in generating and editing UI code and handling web-oriented engineering tasks.

7. 7

   Vision upgrades and stronger computer use

   Sholto states Opus 4.5 is “way better at vision,” which translates into improved ability to use computers. This points to stronger multimodal understanding and more effective interaction with visual interfaces.

8. 8

   Availability and rollout: Shipping today across major clouds

   The announcement closes with release and distribution details: Opus 4.5 is available immediately and, for the first time, is on every major cloud platform. The speaker invites feedback from users.