Anthropic launches Claude Sonnet 5, but the real story is Fable 5's absence

[AINews] Sonnet 5 today, and Fable 5 tomorrow

Anthropic released Claude Sonnet 5 today, calling it the most agentic Sonnet yet with planning, browser/terminal tool use, and a 1M-token context window. Pricing stays at $3/$15 per million tokens, with a promo rate of $2/$10 through late August. The community reaction was muted: benchmarks show it consumed more tokens than Fable, and one test found it cost more than Opus 4.8. The post confirms Fable/Mythos 5 were approved for re-release after government work, but gives no timeline.

Why it matters: Anthropic dropped Sonnet 5 with 1M token context and unchanged list pricing, but tokenizer changes drove 3-6x real consumption—community benchmarks show it may cost more than Fable to run. HKR all hit: the launch is news, the efficiency twist has substance, and Claude users wi...