> Across all three evals, GPT‑5.5 improves on GPT‑5.4’s scores while using fewer tokens.

Yeah, this was the next step. Have RLVR make the model good. Next iteration start penalising long + correct and reward short + correct.

> CyberGym 81.8%

Mythos was self reported at 83.1% ... So not far. Also it seems they're going the same route with verification. We're entering the era where SotA will only be available after KYC, it seems.

Isn't Mythos limited to a selected group of companies/organizations Anthropic chose themselves? If the OpenAI announcement for GPT-5.5 is accurate the "trusted cyber access" just requires an open, seemingly straightforward identity verification step.

https://openai.com/index/scaling-trusted-access-for-cyber-de...

  > We are expanding access to accelerate cyber defense at every level. We are making our cyber-permissive models available through Trusted Access for Cyber , starting with Codex, which includes expanded access to the advanced cybersecurity capabilities of GPT‑5.5 with fewer restrictions for verified users meeting certain trust signals (opens in a new window) at launch.

  > Broad access is made possible through our investments in model safety, authenticated usage, and monitoring for impermissible use. We have been working with external experts for months to develop, test and iterate on the robustness of these safeguards. With GPT‑5.5, we are ensuring developers can secure their code with ease, while putting stronger controls around the cyber workflows most likely to cause harm by malicious actors.

  > Organizations who are responsible for defending critical infrastructure  can apply to access cyber-permissive models like GPT‑5.4‑Cyber, while meeting strict security requirements to use these models for securing their internal systems.

Isn't CyberGym an open benchmark so trivial to benchmaxx anyway?

Not good for employees that are being measured by their token usage.