Anthropicの高額なClaude Fable 5、コスト削減のため「マネージャー」に転身
AnthropicはFable 5をプランナーとして、Sonnet 5にタスクを実行させる仕組みを提案し、46%のコストで96%のパフォーマンスを維持することで、低価格の競合に対抗しようとしている。
anthropic released 'advisor' and 'orchestrator' patterns that repurpose the expensive claude fable 5 as a planning manager, leaving execution to cheaper sonnet 5 models. tests on swe-bench pro show the advisor pattern hits 92% of fable 5's performance at 63% of the cost, while the orchestrator pattern on browsecomp achieves 96% performance at 46% of the cost. this hierarchy separates high-level reasoning from execution, using distinct caches to avoid duplicate processing. the guidance arrives as open-source models and cheaper rivals like gpt-5.6 sol exert pricing pressure on frontier models.