Anthropic, Meta, Google and OpenAI ship four frontier models in 48 hours as scores cluster and API prices split 13-fold

Anthropic, Meta, Google, and OpenAI released four frontier-class models within 48 hours this week, clustering within seven points on an independent intelligence index while list prices for a million input tokens range from $0.75 to $10. Claude Fable 5.1, Muse Spark 1.3, Gemini 3.8 Flash, and GPT-6 Astra are being judged as a new late-2026 stack for agentic coding, computer use, and high-volume production work rather than as a single replacement model.