Claude Opus 5.5 vs GPT-6 Astra: Equal on Coding, Worlds Apart on Cost
Opus 5.5 matches GPT-6 Astra on Terminal-Bench 4.0 for roughly 40% of the cost per task, with 5x cheaper cache reads. Astra keeps uncontested leads in science, maths and gated offensive security — and OpenAI says it is harder to monitor.
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· Abdeladim Fadheli