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MCS · Rigs · Compare

Side-by-side, with the numbers that matter.

Two rigs, one table. Higher numbers win in cobalt; TDP and price flip.

0 of 21 fields comparable

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SpecFrontier (OLCF-5)OpenAI GPT-5
AcceleratorAMD Instinct MI250X—
Cabinets74—
Codex Synergy Precision Bonus—12
Cores9,066,176—
CPUAMD 3rd Gen EPYC 64C 2GHz—
Gpt5 Context Window Tokens K—400
Gpt5 Input PER 1M USD—1.25
Gpt5 Output PER 1M USD—10
Gpt5 Snapshot—gpt-5-2025-08-07
Gpt6 Astra Launch—2026-09-03
Installation Year2,021—
InterconnectHPE Slingshot-11—
LocationDOE/SC/Oak Ridge National Laboratory—
ManufacturerHPE—
ModelHPE Cray EX235a—
Power KW24,607—
Rmax Pflops1,353—
Rpeak Pflops2,055.72—
Top500 Rank Jun20263—
Top500 Rank Nov20252—
Version Major—5