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The models are a point apart. The harnesses are on fire.

This story is from 2026-10-05. It is preserved in the archive; the latest stories are on the live feed.

Two numbers went round in the last few weeks. On Terminal-Bench 2.1, GPT-5.6 Sol scored 89.5% and Claude Opus 5 scored 89.1% . Four tenths of a point between the default models of the two most-used coding agents on earth. Check a second leaderboard and you get 85.77% and 84.64% — different harness,…

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  1. 2026-10-05 10:35 · DEV Community — AI
    The models are a point apart. The harnesses are on fire.

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