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ChatGPT Work

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What is GPT‑5.3‑Codex‑Spark?

GPT-5.3-Codex-Spark is a specialized, ultra-fast coding model designed to enable real-time collaboration within the Codex platform. As a streamlined variant of GPT-5.3-Codex, it prioritizes latency-sensitive workflows where immediate responsiveness is critical. When deployed on Cerebras’ Wafer Scale Engine 3 hardware, Codex-Spark delivers more than 1000 tokens per second, dramatically accelerating interactive development sessions. The model supports a 128k context window, allowing developers to maintain broad project awareness while iterating quickly. It is optimized for making minimal, precise edits and refining logic or interfaces without automatically executing additional steps unless instructed. OpenAI implemented extensive infrastructure upgrades—including persistent WebSocket connections and inference stack rewrites—to reduce time-to-first-token by 50% and cut client-server overhead by up to 80%. On software engineering benchmarks such as SWE-Bench Pro and Terminal-Bench 2.0, Codex-Spark demonstrates strong capability while completing tasks in a fraction of the time required by larger models. During the research preview, usage is governed by separate rate limits and may be queued during peak demand. Codex-Spark is available to ChatGPT Pro users through the Codex app, CLI, and VS Code extension, with API access for select design partners. The model incorporates the same safety and preparedness evaluations as OpenAI’s mainline systems. This release signals a shift toward dual-mode coding systems that combine rapid interactive loops with delegated long-running tasks. By tightening the iteration cycle between idea and execution, GPT-5.3-Codex-Spark expands what developers can build in real time.

What is ChatGPT Work?

ChatGPT Work functions as an innovative assistant within the ChatGPT ecosystem, empowering users to manage extensive projects by overseeing tasks across different applications and documents while dedicating significant time to ensure successful project completion. This tool efficiently aggregates information from diverse sources to generate thorough outputs, including spreadsheets, presentations, written content, and web apps, simplifying complex tasks into achievable steps and executing them independently while keeping the user updated on progress, addressing questions, adjusting priorities, and recommending essential actions. Thanks to its integrated Codex technology and the backing of GPT-5.6, ChatGPT Work goes beyond conventional question-response interactions to enable genuine task execution across web, mobile, and desktop environments. Users can ask it to analyze monthly budget discrepancies, create marketing campaign frameworks from raw data, prepare for sales meetings, or maintain continuity throughout a project, spanning from initial consumer insights to the development of marketing materials and adaptations for specific markets. This adaptability not only allows users to optimize their workflows substantially but also boosts efficiency and guarantees that every detail is meticulously attended to in achieving their objectives. Moreover, the seamless integration of ChatGPT Work into daily operations illustrates its potential to transform how users approach their project management and execution strategies.