Jason Liu (OpenAI) answers your most asked questions about Codex Spark | Cerebras
Jason Liu from OpenAI's Developer Experience team answers your most asked questions about GPT-5.3-Codex-Spark, powered by Cerebras.
Codex Spark is a lighter, faster version of Codex running on Cerebras' specialized AI chips — built for speed, interactivity, and real-time coding workflows. In this video, Jason breaks down how it works, when to use it, and how OpenAI engineers are using Codex internally.
00:25 – What is Cerebras and why does it make Spark faster?
00:41 – When should I use Codex vs. Codex Spark?
01:35 – How many Codex sessions do you run at once?
02:04 – What do OpenAI en…
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Chapters (5)
0:25
What is Cerebras and why does it make Spark faster?
0:41
When should I use Codex vs. Codex Spark?
1:35
How many Codex sessions do you run at once?
2:04
What do OpenAI engineers use Codex for?
2:32
What makes Codex slower?
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