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Colossus 1 is claimed to have roughly 14.6 exaflops of FP64 compute
A user estimates that's about five times the compute of Top500's highest-listed supercomputer.
TLDR
A user estimates Colossus 1 has roughly 14.6 exaflops of FP64, or double-precision, compute—about five times the highest-listed supercomputer on Top500. The user cites Epoch AI's figures for 150,000 H100, 50,000 H200 and 30,000 B200 chips, then applies per-chip performance figures. Epoch AI's June 2026 directory estimated the facility at 276,000 H100-equivalents of AI compute and 340 megawatts of IT power.
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