What just happened in frontier model releases?

Multiple frontier model releases and updates occurred. Anthropic released Claude Sonnet 5, replacing Sonnet 4.6 as default, with agentic performance close to Opus 4.8 at 40% API price [354]. OpenAI released ChatGPT Work, an agent powered by Codex and GPT-5.6 [1041]. LingBot-Video, a 30B-param MoE video model with 3B active params, outperforms Wan2.6, Seedance 1.5 Pro, and Cosmos3 Super on RBench [1042]. GPT 5.6 Sol passed the Replit Benchmark by creating a full Replit clone in one prompt [993]. OpenAI expanded Daybreak to democratize patching vulnerable software, including a Codex Security plugin and GPT-5.5-Cyber model [159]. OpenAI's GPT-5.6 Luna outperforms GPT-5.5 at its highest reasoning setting while costing 25x less [1346]. OpenAI evolves its Bio Bug Bounty into an ongoing private program with doubled rewards up to $50K [1347]. Andrew Ng released a free 2-hour course on building agentic skills with Claude, covering pre-built skills, MCP, subagents, and long-running agents [1851, 1771, 1460]. Google upgraded Gemini with capabilities to read web pages, compare products across tabs, edit images, auto-browse, connect personal data, and integrate with business tools [1864], including voice-controlled image editing, new image templates, and Business Notebooks for company-specific answers [1865]. Kimi K3 release video was generated using Kimi K3 itself, demonstrating creative capabilities [3392]. Claude Code team released a free course on loop engineering with Fable 5, covering agentic loops and deployment [3391]. ExLlamaV3 v1.0.0 production release brings major performance improvements including new attention kernel, tensor-parallel support, and optimized kernels [2605]. Google's Gemini Omni Flash model debuted at #1 on the Artificial Analysis Text to Video and Image to Video Leaderboards, surpassing ByteDance's Seedance 2.0 [2489]. OpenAI announced that GPT-5.6 Luna outperforms GPT-5.5 at its highest reasoning setting while costing 25x less [2279].[17]

Events in order: Anthropic released Claude Sonnet 5 [354]; OpenAI released ChatGPT Work [1041]; LingBot-Video outperformed competitors [1042]; GPT 5.6 Sol passed Replit Benchmark [993]; OpenAI expanded Daybreak [159]; OpenAI's GPT-5.6 Luna outperforms GPT-5.5 at lower cost [1346]; OpenAI evolves Bio Bug Bounty [1347]; Andrew Ng released agentic course [1851, 1771, 1460]; Google upgraded Gemini [1864, 1865]; Kimi K3 release video generated using Kimi K3 [3392]; Claude Code team released free course on loop engineering [3391]; ExLlamaV3 v1.0.0 production release [2605]; Google's Gemini Omni Flash debuted at #1 on leaderboards [2489]; OpenAI announced GPT-5.6 Luna outperforms GPT-5.5 at 25x lower cost [2279]. Claims are emerging except ChatGPT Work [1041] and GPT 5.6 Sol [993] which are corroborated.[17]

Kimi K3 model weights will be released on March 27, as announced by Moonshot AI [3390].[1]