Janakiram MSV • 2/13/2026

OpenAI’s Codex Spark Puts Cerebras on the Inference Map

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OpenAI has released GPT-5.3-Codex-Spark, a compact coding model optimized for real-time interaction, achieving over 1,000 tokens per second by running on Cerebras' Wafer Scale Engine 3 instead of traditional Nvidia GPUs. This article analyzes the technical and strategic implications, explaining how this architectural shift addresses latency in interactive coding and represents a diversification of AI inference hardware, with GPUs still handling training and broader inference workloads.

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OpenAI’s Codex Spark Puts Cerebras on the Inference Map

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