{
  "video_id": "reddit_1w05cv6",
  "channel_slug": "ClaudeAI",
  "channel_handle": "r/ClaudeAI",
  "title": "Did Anthropic release Fable 5.1?",
  "url": "https://www.reddit.com/r/ClaudeAI/comments/1w05cv6/did_anthropic_release_fable_51/",
  "external_url": null,
  "upload_date": "20260827",
  "published_at": "2026-08-27T20:23:09+00:00",
  "transcript": "I just started doing some work with Claude CLI - the last time I touched it, was 4 days ago, and the difference between then and now is completely insane. I'm kinda flabbergasted.\n\nThe speed at which it deals with writing code is bonkers and the way it talks - like 2 to 3 sentences at max, very clearly explaining what's doing.\n\nI'm pretty sure I'm getting routed to Fable 5.1. Anyone else feeling it?\n\n\n\n--- Top Comments ---\n\n\n[1 upvotes] **TL;DR of the discussion generated automatically after 30 comments.**\n\nSo, did Anthropic drop Fable 5.1? The thread's a bit of a mixed bag, but here's the general vibe.\n\nThe prevailing theory, and the top comment, is that **it's not a new model, but recent updates to the Claude Code harness** that are changing the output. Anthropic apparently pushed a couple of new harness versions in the last few days.\n\nThat said, the community is completely split on the *effect* of the changes:\n*   One camp agrees with OP: Fable feels way faster, more concise, and smarter, especially through the CLI.\n*   Another, very vocal camp is seeing the exact opposite: Models (both Fable and Opus) are now *painfully slow* and getting stuck in obsessive \"checking\" and \"planning\" loops, taking hours for simple tasks.\n*   And of course, you've got the usual crowd saying it's all just \"vibes\" and people are hallucinating changes, as is tradition in these parts.\n\nBasically, something *did* change (likely the harness), but whether it's an upgrade or a downgrade currently depends on who you ask and what you're working on.\n\n[97 upvotes] The harness changed with 2 versions in the last 4 days.\n\nHarnesses can also affect output.\n\n[58 upvotes] Something is going on.. both Fable and Opus today are super thorough, but take extremely long. And when I say extremely long I mean I barely got anything done today. Very few mistakes though.. which is expected after checking the same thing 17 times over in different ways. ",
  "transcript_chars": 1942,
  "ingested_at": "2026-08-28T01:30:07.139511+00:00",
  "source": "reddit",
  "yt_meta": {
    "score": 127,
    "upvote_ratio": 0.86,
    "num_comments": 40,
    "author": "NewFg1",
    "is_self": true
  }
}