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Claude Fable 5.1

Anthropic · Claude Fable series · released 1 Sep 2026

Sentiment · since 25 Sep
59
positive
from 181 opinions
Mentions
423
posts and comments

What people praise and criticise

Sentiment per day

Mentions per day

Reddit vs benchmarks

  • #15 of 40
  • #3 of 98
  • #3 of 76
  • #2 of 49
  • #1 of 57
  • #1 of 44
  • #2 of 74

$10 in / $50 out per million tokens · 1M context · reasoning mode

Per subreddit

r/Anthropic
67
r/ClaudeAI
61
r/ClaudeCode
60

Threads behind the opinions

ThreadOpinionsIndex
silly question: if Sonnet & Opus 5.5 is better than Fable 5.1, why would we ever use Fable 5.1 again?1565
Is Fable 5.1 needed any more ?1263
so if Fable 5.1 was a stop-gap for Opus 5.5 then what is Fable 5.1 good for now?1070
If opus 5.5 is basically fable level, what are you still using fable for?7–
Fable 5.1 or Opus 5.5?7–
Fable 5.1 is much better at system design than Opus 5.57–
Opus 5.5 vs Fable 5.1?6–
Opus 5.5 picked Squirtle because of Brock. Fable 5.1 picked Charmander because it was the closest ball. One cost $8, the other $100.5–
Fable 5.1 - Live Vehicle Diagnostics4–
If tokens weren't an issue, which model would you choose, and why? Opus 5.5 versus Fable 5.1.4–
Is Fable 5.1 still relevant after Opus 5.5 ?4–
do we stop using fable 5.1 now or what?4–
Now I finally understand why Anthropic was saying they were so scared a couple days back.3–
Opus 5.5 is the beginning of a new era3–
How many of us are non coders?3–
Should I let Opus 5.5 continue my Fable 5.1 build?3–
Anthropic killed it with Opus 5.5!3–
Opus 5.5 slaying it for code, but nowhere close to Fable 5.1 for legal writing2–
1 Week with Opus 5.52–
Elon musk directly sh*tting on Gemini2–