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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.

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SpecFrontier (OLCF-5)Anthropic Claude Opus 4.7
AcceleratorAMD Instinct MI250X—
Cabinets74—
Cache Discount Percent—90
Cache Read PER 1M USD—0.5
Claude Code Synergy Precision Bonus—15
Context Window Tokens M—1
Cores9,066,176—
CPUAMD 3rd Gen EPYC 64C 2GHz—
Current Opus Model—Claude Opus 5.5
Current Opus Version—5.5
Installation Year2,021—
InterconnectHPE Slingshot-11—
Lifecycle Status—legacy (still available)
LocationDOE/SC/Oak Ridge National Laboratory—
ManufacturerHPE—
MAX Output Tokens K—128
ModelHPE Cray EX235a—
Power KW24,607—
Pricing Input PER 1M USD—5
Pricing Output PER 1M USD—25
Released—2026-04-16
Rmax Pflops1,353—
Rpeak Pflops2,055.72—
TOP Listed Model—Claude Fable 5.1
TOP Listed Model Version—5.1
Top500 Rank Jun20263—
Top500 Rank Nov20252—
Version Decimal—4.7
Version Major—4
Version Minor—7