So what's the deal with Amazon Nova? They released Nova 2 in December, and even then, the top flight Nova 2 model trailed Sonnet 4.5. And it…

Amazon released the Nova 2 model family on December 2, 2025 at AWS re:Invent, comprising Nova 2 Lite, Nova 2 Pro (Preview), Nova 2 Omni, and Nova 2 Sonic, all featuring a 1-million-token context window, extended thinking with adjustable reasoning levels, and built-in tools like code interpreter and web grounding. According to Amazon's own benchmarks, the flagship Nova 2 Pro is equal to or better than Claude Sonnet 4.5 on only 10 of 16 benchmarks, while independent observers noted that the Nova line-up "continues to generally lag other AIs with scattered higher scores on some agentic benchmarks." Despite meaningful generational improvements, Nova models held less than a 5% share of the enterprise LLM market as of mid-2025, well behind Anthropic, OpenAI, and Google.

So we now have a pretty good picture of the state of the frontier AI model makers. US closed source models continue to lead. Google, OpenAI,…
After playing with it a bit, Meta's Muse Spark Thinking is fine so far, but really doesn't match the current Big Three models. It also is a …
The US frontier labs have all walked away from open weights. They continue to occasionally release excellent open models (Gemma 4, etc), but…
Meta's new model is Muse Spark, and meta.ai chat has some interesting tools

Source: model-releases

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