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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 18 fields comparable

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SpecCerebras Wafer-Scale Engine 3OpenAI GPT-5
Codex Synergy Precision Bonus—12
Cores900,000—
CS4 Introduced2026-08-18—
CS4 Wse3 Turbo Count3—
DIE Size MM246,225—
Fabric Bandwidth Pbit S214—
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
Memory Bandwidth PB S21—
ON Chip Sram GB44—
Peak AI Petaflops125—
Process NodeTSMC 5nm—
Transistors Trillion4—
Version Major—5
Wse3 Turbo Peak AI Petaflops250—