Cerebras CFO claims GPT-5.4 and GPT-5.5 running on wafer-scale chips
Cerebras Systems' CFO said during the company's IPO coverage that it is testing OpenAI's unreleased GPT-5.4 and GPT-5.5 models on its wafer-scale inference chips, with public availability planned soon.

Cerebras Systems is running OpenAI's unreleased GPT-5.4 and GPT-5.5 models internally on its wafer-scale inference chips and plans to make them publicly available soon, according to the company's CFO during a CNBC interview on May 14.
The statement emerged during coverage of Cerebras's IPO, which closed as the largest AI hardware offering of 2026. The CFO did not specify a release timeline or pricing structure, but emphasized the performance advantage of pairing next-generation language models with Cerebras's CS-3 chip architecture. The CS-3 packs 850,000 cores on a single silicon wafer and has been used to serve models like Llama 3.1 405B at speeds an order of magnitude faster than GPU clusters.