🆓 GPT-5.6 Luna ships free to all ChatGPT users 🆓
OpenAI expands access to frontier-class text intelligence at zero cost.

OpenAI has made GPT-5.6 Luna the default model for all Free and Go tier users, simultaneously removing all usage limits on text-based chats. A new "Think" button gives users optional access to higher-level reasoning capabilities on demand. Separate usage caps still apply for files, images, voice interactions, and image generation — reflecting OpenAI's strategy of monetizing advanced multimodal features while making core text intelligence universally available. This move puts frontier-class AI in the hands of hundreds of millions of users at zero cost, raising the competitive bar for every rival AI assistant and making paid tiers harder to justify on text capabilities alone.

🧬 AI designs 16 working viruses from scratch 🧬
Stanford and Arc Institute researchers generated fully functional viral genomes, raising biosecurity questions.

Researchers at Stanford and the Arc Institute used AI language models — Evo 1 and Evo 2 — trained on millions of genomes to design 16 fully functional viruses not found in nature, with results published in Science. Of 285 synthesized phages targeting E. coli, 16 were viable, some replicating faster than their natural counterparts. A cocktail of the AI-designed viruses eliminated E. coli strains that had become resistant to the natural virus, offering a proof of concept for phage therapy against antibiotic-resistant infections. The team excluded human, animal, and plant viruses from training data as a safety measure, but with Evo 2 being open-source, dual-use biosecurity concerns demand urgent regulation attention.

🌀 WeatherNext adds extra day to cyclone forecasts 🌀
Google open-sources an AI model that extends cyclone prediction accuracy by a full day.

Google DeepMind released WeatherNext, an AI model achieving state-of-the-art accuracy in predicting a cyclone's track, intensity, and wind structure, giving forecasters on average an extra day's worth of predictive accuracy compared to existing methods. The model already proved its real-world value: it predicted Hurricane Melissa's rapid intensification and landfall in Jamaica during the 2025 hurricane season, enabling earlier warnings. Google has open-sourced both WeatherNext 2 and WeatherNext Cyclones, lowering barriers for meteorological agencies worldwide — a clear signal that frontier AI can deliver measurable societal benefit. This open rollout could accelerate adoption across disaster preparedness agencies globally.

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🔬 Anthropic cuts Fable 5 biology false positives 85% 🔬

Anthropic has rewritten the safety classifier for Fable 5's biology-related responses, cutting false positives by approximately 85% and restoring access to a wide range of health, educational, and general biology questions — a key usability fix given the competitive pressure from rivals with looser defaults. At launch, the model had blocked nearly all biology queries as a precaution. The updated classifier now handles everyday tasks like understanding lab results and interpreting symptoms, while continuing to route sensitive dual-use queries involving virology and toxicology to the more restricted Opus model.

🌐 Google ships Gemma Translator for offline use 🌐

Google released Gemma Translator, an open-source, on-device AI translation stack that runs locally without cloud connectivity, addressing privacy and speed concerns in low-bandwidth or offline environments. By open-sourcing the full stack, Google lowers the integration barrier for developers building translation into mobile and edge devices. The release expands the Gemma ecosystem beyond chat and reasoning, positioning it as a practical on-device toolkit where latency and data sovereignty matter most.