r/ClaudeAI: Developer Tests Fable 5 Against Haiku 4.5 in Orange Negotiation — Fable 5 Dominates After Earlier Loss to Opus 4.8

Following community interest after a post showing Fable 5 losing a structured orange negotiation to Opus 4.8, a developer reran the same fixed-rules experiment with Haiku 4.5 defending and reports Fable 5 dominated completely. The asymmetric results — Fable 5 loses up-tier, crushes down-tier — are prompting discussion about task-specific model selection in multi-agent pipelines and whether the negotiation scenario is a useful informal benchmark for agentic reasoning capability across the Claude model family.