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VerdictPal · editorial desk · updated 16 Oct 2026VerdictPal
Compare · Two models, head-to-head

Pick two models. See the diff.

Composite scores, benchmark ranks, capability grids, and pricing per million tokens. All sourced from the same data that powers the model atlas.
ToolsModels

Claude Fable 5.1 vs Claude Fable 5

Claude Fable 5.13stats won
Tied3stats
Claude Fable 50stats won
Spec showdown

Capacity, price, freshness.

Claude Fable 5.1vsClaude Fable 5

Claude Fable 5.1 dominates on composite score (77 vs 62), driven by broader benchmark coverage and stronger per-family performance. Claude Fable 5.1 has the higher benchmark mix (77 vs 62).

  1. Composite score
    Claude Fable 5.177Winner on this rowClaude Fable 562
  2. Benchmark mix
    Claude Fable 5.177Winner on this rowClaude Fable 562
  3. Context window
    Claude Fable 5.11MClaude Fable 51M
  4. Max output
    Claude Fable 5.1128KClaude Fable 5128K
  5. Input price / 1M (lower wins)
    Claude Fable 5.1$10Claude Fable 5$10
  6. Output speed (AA default API)
    Claude Fable 5.167 t/sWinner on this rowClaude Fable 565 t/s
Composite score
77Winner on this row
vs
62
Benchmark mix
77Winner on this row
vs
62
Context window
1M
vs
1M
Max output
128K
vs
128K
Input price / 1M (lower wins)
$10
vs
$10
Output speed (AA default API)
67 t/sWinner on this row
vs
65 t/s
Capability grid

What each model can do.

Modalities

Claude Fable 5.1Claude Fable 5
Text●●
Image●●
Audio——
Video——
Code●●
Tool use●●
Reasoning●●

Access

Claude Fable 5.1Claude Fable 5
API●●
Consumer app●●
Open weights——
Managed cloud●●
On-device——
Family profile

Top score per benchmark family.

Knowledge
67Winner on this row
vs
65
Reasoning
94Winner on this row
vs
93
Coding
63
vs
70Winner on this row
Agentic
91Winner on this row
vs
85
Long context
85Winner on this row
vs
82
Benchmark ranks

Every shared benchmark, side by side.

Knowledge

AA-Omniscience#1/12 · #2/12
67%Winner on this row
vs
65%

Reasoning

GPQA Diamond#8/184 · #21/184
93.7%Winner on this row
vs
92.6%
Humanity's Last Exam#2/186 · #3/186
59.1%Winner on this row
vs
55.5%

Coding

SciCode#2/97 · #3/97
63.1%Winner on this row
vs
61%

Agentic

Terminal-Bench#1/167 · #15/167
91.39%Winner on this row
vs
84.64%

Long context

AA-LCR#3/184 · #18/184
85.33%Winner on this row
vs
82.33%

Performance

AA output speed#91/195 · #96/195
67 t/sWinner on this row
vs
65 t/s
Dossier facts

Dates, sources, fineprint.

Claude Fable 5.1Claude Fable 5
ProviderAnthropicAnthropic
FamilyClaude FableClaude Fable
Release date2026-09-012026-06-09
Knowledge cutoff2026-06-012026-04-01
Context window1M1M
Max output128K128K
Input price /1M$10$10
Output price /1M$50$50
Statussolidflagship
Composite score7762
Intelligence score7762
Intel sourcecompositecomposite
Benchmark rows710
Source count13
Freshnessfreshfresh
Pricing checked2026-09-182026-06-09
Ecosystem

Which tools wrap each model.

Verdict

Which model to actually pick.

Claude Fable 5.1 dominates on composite score (77 vs 62), driven by broader benchmark coverage and stronger per-family performance. Claude Fable 5.1 has the higher benchmark mix (77 vs 62).

Open Claude Fable 5.1's dossierOpen Claude Fable 5's dossier

Questions this comparison answers

Every answer below is assembled from the dated fields on this page. Nothing is written separately for search.

Should you use Claude Fable 5.1 or Claude Fable 5?

Claude Fable 5.1 dominates on composite score (77 vs 62), driven by broader benchmark coverage and stronger per-family performance. Claude Fable 5.1 has the higher benchmark mix (77 vs 62).

Is Claude Fable 5.1 or Claude Fable 5 cheaper?

Claude Fable 5.1: $10 / $50. Claude Fable 5: $10 / $50.

How do the Claude Fable 5.1 and Claude Fable 5 context windows compare?

Claude Fable 5.1: 1M. Claude Fable 5: 1M.