METR: Claude Opus 4.5 has a 50% task completion time horizon ...
5 hours ago · METR: Claude Opus 4.5 has a 50% task completion time horizon of about 4 hours and 49 minutes, more than double that of Claude Opus 4 released earlier this year — We estimate that, on …
Applying Claude Opus 4.5's strengths to your everyday work
Learn how Claude Opus 4.5 excels at complex multi-step work including long conversations, polished document creation, and sophisticated coding.
I tested ChatGPT-5.2 and Claude Opus 4.5 with real-life ...
Dec 12, 2025 · I tested ChatGPT-5.2 and Claude Opus 4.5 on seven real-life scenarios to see which handles judgment, ambiguity and responsibility better. There was a clear winner.
Claude Opus 4 and Claude Sonnet 4 Evaluation Results
May 25, 2025 · A detailed analysis of Claude Opus 4 and Claude Sonnet 4 performance on coding and writing tasks, with comparisons to GPT-4.1, DeepSeek V3, and other leading models.
Claude Opus 4.5 Benchmarks and Analysis
Nov 25, 2025 · Claude Opus 4.5 delivers a substantial intelligence uplift over Claude Sonnet 4.5 (+7 points on the Artificial Analysis Intelligence Index) and Claude Opus 4.1 (+11 points), establishing it …
Claude Opus 4.5 \ Anthropic
Aug 5, 2025 · Extensive testing and evaluation—conducted in partnership with external experts—ensures the release of Opus 4.5 meets Anthropic’s standards for safety, security, and …
Claude Sonnet 4.5 vs Opus 4.5: The Complete Comparison
Nov 28, 2025 · I've spent two months with Claude Sonnet 4.5 since its September release and just had my first week with Opus 4.5. This isn't a theoretical comparison based on marketing materials—this …