OpenAI rolled out its GPT‑5.5 model, a leap ahead in code‑generation and office‑automation tasks, after Anthropic limited its Claude Mythos release to a few high‑profile partners. The new system is now available to the millions who use ChatGPT, broadening access while retaining security guardrails.

The company emphasized that GPT‑5.5 will not yet appear as an API, granting it time to probe vulnerabilities before wider deployment. Benchmarks from Vals AI rank GPT‑5.5 below Anthropic’s top‑tier Claude Mythos, hinting that the race for the most capable code‑writing AI is still open.

By opening GPT‑5.5 to a broader user base, OpenAI signals confidence that its security measures can withstand public scrutiny. Investors will watch how the model’s performance impacts subscription growth for ChatGPT Plus and enterprise licensing, while cybersecurity firms assess the new tool’s potential to expose or patch software flaws.

Broad adoption of GPT‑5.5 could redefine software development cycles, compressing coding time and reshaping the role of human developers in the near future.