Intelligence Index

Latest developments

2026

◆ Google released and began rolling out its Gemini 4 Argon frontier AI model across its API and Google products with tiered access and introductory token pricing Model release

◆ Meta released the Muse Wonder model family and the Muse Spark Open open-weight model for AI agent and coding workloads Model release

◆ Anthropic released Claude Opus 5.5 with updated cybersecurity safeguards and testing controls Model release

◆ OpenAI released GPT-6 Astra, its flagship AI model, along with evaluation results, a system card, and related updates to how the model is benchmarked and priced Model release

◆ Meta releases Muse Spark 1.3, rolling it out via its Model API and to Meta AI platforms Model release

• 14 Oct Gemini 4 Argon benchmark results: accuracy vs. abstention
• 13 Oct Meta’s Muse Wonder Matches Claude Fable for Less
• 22 Sep Claude Opus 5.5: Anthropic Launches New Top Model Despite Calling for AI Slowdown
• 5 Sep GPT-6 Still Behind Fable 5.1 As Artificial Analysis Overhauls Intelligence Index
• 4 Sep Artificial Analysis benchmarks GPT-6 Astra vs other agent models
• 3 Sep GPT-6 Astra Trails Top Models From Anthropic and Meta in Benchmarks
• 3 Sep Muse Spark 1.3: Meta Is Back at the Top, and the Best Open-Weight Model Could Follow

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