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There’s no single best Claude model — the right choice depends on how much intelligence, speed, and cost your task requires. Learn when to use Haiku, Sonnet, Opus, or Fable, and how effort settings and model routing can help you balance performance and cost.
Anthropic’s ongoing system-prompt changelog now documents instructions for Claude Fable 5 and Opus 5, revealing how the company steers agentic behavior in its newest models.
DeepSeek’s flagship V4 Pro left preview as build 0813, a 1.6-trillion-parameter model that nears frontier benchmarks at roughly a sixtieth of Anthropic’s Fable 5 pricing.
Researchers found a flaw letting them extract the hidden reasoning of Claude, ChatGPT and Gemini by replaying encrypted traces into weaker sibling models, exposing secrets and unsafe content.
SpaceXAI released Grok 4.6, built for long-running agents and visual work, claiming parity with GPT-5.6 Sol on a composite benchmark while keeping its low, efficiency-focused pricing.
Anthropic has signed a compute agreement with SpaceX that adds access to more than 220,000 NVIDIA GPUs at the Colossus 1 data center. The added capacity is already being used to raise Claude usage limits and API availability.
Cursor-powered AI agent deleted PocketOS’s production database and backups in seconds after acting autonomously.
Anthropic ran an internal experiment where AI agents negotiated and closed real-world transactions between employees. The results show stronger models secure better deals, often without users noticing.
Anthropic has released Claude Opus 4.7 with improved coding, vision, and reliability features. The update also introduces new safety controls for cybersecurity use cases.
A data leak at Anthropic exposed details of its upcoming Claude Mythos model, described as a major leap in AI capabilities, along with internal documents.
Anthropic has released Claude Sonnet 4.6, upgrading its mid-tier AI model with stronger coding, computer use, and long-context reasoning while keeping pricing unchanged.
Anthropic’s Super Bowl advertising campaign helped push its Claude chatbot into the top 10 apps on the U.S. App Store, driving a sharp rise in downloads.
Anthropic raised $30 billion in a funding round valuing the company at $380 billion, fueled by strong demand for Claude and rapid enterprise AI adoption.
Anthropic released Opus 4.6 with new agent team capabilities, while OpenAI quickly followed with a more advanced Codex model, underscoring intensifying competition in AI-powered software development.
Elon Musk-backed xAI’s Grok 4 leads a live AI stock trading test, generating a 7 percent return on a $100,000 allocation.