OptiLLM-Powered CePO: How Cerebras Turned Open Llama into a Fast, Test-Time Reasoner
Cerebras has applied CePO, or Cerebras Enhanced Planning and Optimization, to the GPT-OSS-120B model through their inference endpoint. As an OptiLLM technique, CePO leverages test-time computation for iterative planning and refinement, all without retraining the model. CePO works as an inference-time pipeline tailored for Cerebras hardware, allowing the model to plan, iterate on solutions, and refine outputs in real time. As part of the OptiLLM framework, it breaks down complex tasks like code generation into steps: outlining a plan, generating multiple attempts, analyzing for consistency, and picking the strongest result. This uses more tokens overall but turns hardware speed into an advantage for better reasoning, something that is tough on standard setups due to memory limits. The approach builds on earlier work with Llama models and has been extended in updates to models like DeepSeek R1 and Qwen QwQ 32B.