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Models2026-07-10 · source-backed
xAI launched it July 8, describing it as Opus-class but faster and more token-efficient, at $2/1M in and $6/1M out. Trained across tens of thousands of NVIDIA GB300 GPUs with RL over hundreds of thousands of multi-step software engineering tasks, and trained alongside Cursor, shipping day-one in Cursor on all plans. Anthropic and OpenAI both ship into third-party IDEs. Neither has claimed joint training. A lab co-developing with a harness rather than shipping to one is a genuinely new distribution pattern, and given how much Databricks says harness choice matters, possibly a durable moat.
Each link below shares sources, entities, or timing with this story.
Opus built by Anthropic / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Opus built by Anthropic); both cover Anthropic, July, OpenAI, Opus; overlapping topics (agent, alongside, anthropic).
Anthropic released Claude Code / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Anthropic released Claude Code); both cover Anthropic, Cursor, OpenAI, Opus; overlapping topics (agent, coding, cursor).
Anthropic released MCP / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Anthropic released MCP); both cover Anthropic, Cursor, Grok, OpenAI; overlapping topics (agent, anthropic, coding).