Releases from frontier labs, major companies and research institutes — grouped by model, deduplicated across HuggingFace, OpenRouter and official blogs.
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xAI🇺🇸Frontier
Anthropic's Opus-tier flagship addresses prior feedback by communicating clearly; delivers Fable 5.1 intelligence at a 20% lower price and is notably token-efficient, especially for long agentic workflows via slashed cache prices.
xAI🇺🇸Frontier
Grok 4.6 is a model developed by xAI, featuring a context window of 500,000 tokens. It is available in a standard variant.
xAI🇺🇸Frontier
Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.
xAI🇺🇸Frontier
xAI's coding-focused model — 256K context, $1/$2 per MTok. 'Build' implies software development as the main use case. A separate coding line alongside the general-purpose Grok 4.3.
xAI🇺🇸Frontier
xAI's current frontier model on OpenRouter ($1.25/$2.50 per MTok). Grok 4.3 positions itself as a strong all-rounder. Also accessible via Grok.com / X Premium.