OpenAI says GPT‑5.5 Instant, ChatGPT’s default model, is more accurate, cuts hallucinated claims in internal tests, and adds visibility into what context was used for personalization.
NIST’s CAISI says its evaluation of DeepSeek V4 Pro finds the model lags the frontier by about eight months, based on benchmarks spanning cyber, coding, science, reasoning, and math.
NIST’s CAISI signed new agreements with Google DeepMind, Microsoft, and xAI to run pre-deployment evaluations and expand federal research on AI security.