Anthropic
Anthropic's most capable generally available model at its September 2026 launch, improving on Fable 5 for long-running coding, research, and knowledge work according to the provider's evaluations. Available through paid Claude plans and provider APIs, with proprietary weights and safety safeguards.
Anthropic's most capable generally available model at its September 2026 launch, improving on Fable 5 for long-running coding, research, and knowledge work according to the provider's evaluations.
Anthropic
Price record: 2026-09-07. Source: https://platform.claude.com/docs/en/models/fable-5-1/overview.
Confirm this specific model, usage limits, and billing terms with the provider. A subscription does not automatically include API credits.
No login needed to compare. Prices are in USD; provider charges are separate from AI Market Cap plans. Context length, caching, tools, taxes, and regional terms can change the final cost. Open weights do not mean free hosting.
60.7
Quality Score
1289
Arena ELO
Undisclosed
Parameters
1M
Context
This measures the amount of verifiable public evidence we have, not how capable the model is. A missing field means it has not been verified yet, not that its value is zero.
16 of 22 public signals
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
Sign in to join the discussion
0
Downloads
0
Likes
Sep 2026
Released
3/5 signals
3/4 signals
5/5 signals
1/4 signals
4/4 signals
Parameters
—
Training compute
Not reported
Dataset scale
Not reported
Base model
Not reported
Source-reported access: API access · Confident confidence
Gaps we are still tracking
1289
ELO Score
1277 - 1301
95% Confidence
+/-12 points
2.7K
Battles
Sep 16, 2026
Last Updated