Introducing GPT-5.3-Codex-Spark

OpenAI posted an item titled “Introducing GPT-5.3-Codex-Spark,” confirming the model name GPT-5.3-Codex-Spark. The body is empty in the RSS snippet, so pricing, context window, launch scope, and code-specific details are not disclosed.

Why it matters: An official OpenAI post confirms a new model name, so HKR-H and HKR-R pass on novelty and developer attention. HKR-K fails because the body discloses no specs, pricing, context window, benchmarks, or product scope, keeping this at the featured floor.