OpenAI's new Spark model codes 15x faster than GPT-5.3-Codex - but there's a catch

OpenAI's new GPT-5.3-Codex-Spark promises ultra-fast, conversational AI coding, if you can tolerate a few trade-offs.

ChatGPT 5.3 Codex Launches : 5 Things You Need to Know

OpenAI has launched GPT-5.3 Codex offering a 25% speed increase over GPT-5.2 Codex, helping developers ship code faster.
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OpenAI’s GPT-5.3-Codex Wants to be More than a Coding Copilot

OpenAI is pitching GPT-5.3-Codex as a long-running “agent,” not just a code helper: The company says the model combines GPT-5.2-Codex coding strength with GPT-5.2 reasoning and professional knowledge, ...
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GPT-5.3-Codex-Spark delivers ultra-fast real-time AI coding at 1,000 tokens per second

OpenAI has launched GPT-5.3-Codex-Spark, its first AI model built specifically for real-time coding, capable ...

OpenAI’s rapid GPT-5.3-Codex model moves beyond simple coding tasks

“Codex-Spark is the first step toward a Codex that works in two complementary modes: real-time collaboration when you want ...