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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 20 fields comparable

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SpecAMD Instinct MI355XOpenAI GPT-5 Core
Bf16 Matrix Pflops Dense5
Codex Synergy Precision Bonus12
Compute Units256
Context Window Tokens M2
Form factorOAM (liquid-cooled)
Fp16 Matrix Pflops Dense5
Fp32 Vector Tflops157.3
FP4 Matrix Pflops Dense20.1
FP6 Matrix Pflops Dense20.1
Fp64 Matrix Tflops78.6
FP8 Matrix Pflops Dense10.1
HBM (GB)288
HBM TypeHBM3E
Memory bandwidth (TB/s)8
Pcie GEN5
Pricing Input PER 1M USD12
Pricing Output PER 1M USD60
Process Node NM3
TBP Watts1,400
Version Major5
Compare · AMD Instinct MI355X vs OpenAI GPT-5 Core · MadCoolStuff