GPT-6.1 Terra nearly matches Claude Opus 5.5 at 3x speed and 1/9th cost
VraserX · x · 2026-10-28
Blogger VraserX reports GPT-6.1 Terra, a much smaller model, kept pace with Claude Opus 5.5 on a coding task — completing it 3x faster at roughly a ninth of the cost. He notes one more polish pass and Terra would likely match Opus outright, while staying far cheaper.
Unofficial hands-on impression, not a formal benchmark.
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