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OpenAI Launches GPT-5.3-Codex: Self-Improving Agentic Coding Model
OpenAI releases GPT-5.3-Codex, combining frontier coding from GPT-5.2-Codex with GPT-5.2's reasoning. 25% faster, self-building AI handles long-horizon tasks, available on paid plans amid rivalry with Anthropic's Opus 4.6.
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1. Introducing GPT-5.3-Codex GPT-5.3-Codex is a Codex-native agent that pairs frontier coding performance with general reasoning to support long-horizon, real-world technical work. --- 2. GPT-5.3-Codex <a href="https://news.ycombinator.com/item?id=46902638">Comments</a> --- 3. OpenAI Just Launched GPT-5.3-Codex: A Faster Agentic Coding Model Unifying Frontier Code Performance And Professional Reasoning Into One System <p>OpenAI has just introduced GPT-5.3-Codex, a new agentic coding model that extends Codex from writing and reviewing code to handling a broad range of work on a computer. The model combines the frontier coding performance of GPT-5.2-Codex with the reasoning and professional knowledge capabilities of GPT-5.2 into a single system, and it runs 25% faster […]</p> <p>The post <a href="https://www.marktechpost.com/2026/02/05/openai-just-launched-gpt-5-3-codex-a-faster-agentic-coding-model-unifying-frontier-code-performance-and-professional-reasoning-into-one-system/">OpenAI Just Launched GPT-5.3-Codex: A Faster Agentic Coding Model Unifying Frontier Code Performance And Professional Reasoning Into One System</a> appeared first on <a href="https://www.marktechpost.com">MarkTechPost</a>.</p> --- 4. GPT-5.3-Codex System Card GPT‑5.3-Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.2-Codex with the reasoning and professional knowledge capabilities of GPT‑5.2. --- 5. OpenAI releases GPT-5.3-Codex, a coding model that helped build itself - Mashable <a href="https://news.google.com/rss/articles/CBMiV0FVX3lxTE5CTGRjMlMzbHpDUkVmR3FFcTZmY2Utb25vV1VnSXhqdWhYWWNDTEx3cmpnMU9odnczaUFSTkY5UXBaY0duUEpmYVl0djVmb1UzeUdoYmZtMA?oc=5" target="_blank">OpenAI releases GPT-5.3-Codex, a coding model that helped build itself</a> <font color="#6f6f6f">Mashable</font> --- 6. OpenAI and Anthropic go to war: Claude Opus 4.6 vs GPT 5.3 Codex **OpenAI** launched **GPT-5.3-Codex**, emphasizing **token efficiency**, **inference speed**, and hardware/software co-design with **GB200-NVL72** and **NVIDIA** collaboration. The new **Frontier** agent platform supports business-context agents with execution environments and learning capabilities. **Anthropic** showcased **Opus 4.6** agent teams autonomously building a clean-room C compiler booting Linux, highlighting advances in agentic coding and long-context capabilities. Community benchmarks report **2.93× faster** inference and significant efficiency gains, signaling a shift away from infinite compute budgets in 2026. --- 7. OpenAI launches GPT-5.3-Codex, its most advanced self-improving coding model yet <a href="https://www.indiatoday.in/technology/news/story/openai-launches-gpt-53-codex-its-most-advanced-self-improving-coding-model-yet-2864014-2026-02-06"> <img align="left" hspace="2" height="180" width="305" alt="" border="0" src="https://akm-img-a-in.tosshub.com/indiatoday/images/story/202602/openai-020901299-16x9.png?VersionId=LnsEsyIQRcstZVgF3U1HN_itSm0wQvZL"> </a> OpenAI launches GPTCodex its most advanced selfimproving coding model yet --- 8. OpenAI launches GPT-5.3-Codex for software tasks on paid plans OpenAI introduces GPT-5.3-Codex with faster performance, expanded agent functions for developers, and strong coding benchmark results across multiple tasks. --- 9. GPT-5.3-Codex Arrives as OpenAI's First AI Model That Helped Build Itself OpenAI has rolled out GPT-5.3-Codex, its most advanced agentic coding model yet. It merges frontier coding strengths from GPT-5.2-Codex with improved reasoning and professional knowledge from GPT-5.2,...