Opus

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Opus is Anthropic's Claude Opus model line, used for coding and complex reasoning. Recent coverage focused on practical use: a developer reported Claude Code sending full transcripts every ~30 seconds to generate a 3-5 word status line, burning 15-20% of tokens; in Surge AI's tax benchmark, Opus caught a $250,000 residence deadline that an agent missed in all five attempts; other posts discussed migrating preprompts from Opus to self-hosted Ollama.

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Surge AI Launches DAYJOB: Tax Agent Benchmark

Surge AI added a tax benchmark to its DAYJOB family: 50 environments across eight tax practice areas, testing agents' professional judgment alongside calculations. In one example, an agent picked the right sale date but missed a residence deadline affecting a $250,000 exclusion in all five attempts; Opus caught it every time.

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