"The Codex team at OpenAI is on fire. Less than two weeks after releasing a dedicated agent-based Codex app for Macs, and only a week after releasing the faster and more steerable GPT-5.3-Codex language model, OpenAI is counting on lightning striking for a third time. Also: OpenAI's new GPT-5.3-Codex is 25% faster and goes way beyond coding now - what's new Today, the company has announced a research preview of GPT-5.3-Codex-Spark, a smaller version of GPT-5.3-Codex built for real-time coding in Codex."
"Also: OpenAI's Codex just got its own Mac app - and anyone can try it for free now Codex-Spark will initially be available only to $200/mo Pro tier users, with separate rate limits during the preview period. If it follows OpenAI's usual release strategy for Codex releases, Plus users will be next, with other tiers gaining access fairly quickly. (Disclosure: Ziff Davis, ZDNET's parent company, filed an April 2025 lawsuit against OpenAI, alleging it infringed Ziff Davis copyrights in training and operating its AI systems.)"
"Expanding the Codex family for real-time collaboration OpenAI says Codex-Spark is its "first model designed specifically for working with Codex in real-time -- making targeted edits, reshaping logic, or refining interfaces and seeing results immediately." Let's deconstruct this briefly. Most agentic AI programming tools take a while to respond to instructions. In my programming work, I can give an instruction (and this applies to both Codex and Claude Code) and go off"
OpenAI introduced GPT-5.3-Codex-Spark, a smaller latency-focused model built for real-time, conversational coding workflows. Codex-Spark generates code roughly 15 times faster while remaining capable for real-world coding tasks. OpenAI reports big latency wins across the Codex stack: about 80% faster roundtrip and 50% faster time-to-first-token. The Codex serving tier runs on Cerebras WSE-3 chips to prioritize latency. Codex-Spark is designed for immediate targeted edits, logic reshaping, and interface refinements. The model enters a preview limited to $200/month Pro users with separate rate limits and phased broader access expected later.
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