(damn, OpenAI was ahead shortly with Astra but now Anthropic again is leading with Opus 5.5?) “1. Major Performance & Benchmark Gains Capabilities Jump: Claude Opus 5.5 represents a massive leap forward in intelligence—outperforming OpenAI's GPT-6 Astra and Anthropic's Fable 5.1 across benchmarks in agentic coding, multidisciplinary reasoning, computer use, and chart recognition Better Pricing: Despite the performance gains, pricing is lower than Opus 5 ($4/M input tokens, $20/M output tokens)”