{"version":"2.1.170","anchor":"fable-5-noted-in-system-prompt-model-guidance","canonical_anchor":"fable-5-noted-in-system-prompt-model-guidance","heading":"Fable 5 Noted in System Prompt Model Guidance","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.170\/e\/fable-5-noted-in-system-prompt-model-guidance","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.170","markdown":"### Fable 5 Noted in System Prompt Model Guidance\n\nThe system prompt context now mentions Fable 5 when describing available models: \"The most recent Claude models are Fable 5 and the Claude 4.X family. Model IDs \u2014 Fable 5: '[id]', Opus 4.8: '[id]', Sonnet 4.6: '[id]', Haiku 4.5: '[id]'.\"\n\n**Evidence**\n\nUpdated system prompt string (search for `\"The most recent Claude models are Fable 5\"`)"}