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# The long-running coding claim met the benchmark
- URL: https://enteruaf.com/the-long-running-coding-claim-met-the-benchmark/
- Published: 2025-09-29T12:00:00.000Z
- Updated: 2026-09-23T04:09:07.000Z
- Author: UAF Editorial
- Tags: Agents, Research

Anthropic’s Sonnet 4.5 launch made a striking claim about sustained autonomous coding and paired it with benchmark results. The useful reporting question is how long-running work changes the burden of verification.

Duration is not reliability. A system that can continue for hours also has more opportunities to compound a bad assumption. Long-horizon agents need checkpoints, tests, rollback and a human who can tell whether progress is real.