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.

Tools Models

Claude Fable 5.1 vs GPT-5.6 Sol

Model A

Model B

MODEL A

Claude Fable 5.1

Anthropic · Claude Fable

Composite 77Intel 777 rows1 sources

Anthropic's 1 Sep 2026 Mythos-class refresh of Fable 5. Same $10 / $50 per 1M tokens, cache reads $0.25 per 1M. 1M context, 128K output.

MODEL B

GPT-5.6 Sol

OpenAI · GPT-5.6

Composite 64Intel 6411 rows3 sources

OpenAI's July 2026 GPT-5.6 flagship, superseded as the current OpenAI flagship by GPT-6 Astra on 3 Sep 2026. Promo API list still $4 / $20 per 1M tokens (short context) through 21 Nov 2026.

Claude Fable 5.13stats won

Tied1stats

GPT-5.6 Sol2stats won

Spec showdown

Capacity, price, freshness.

Claude Fable 5.1vsGPT-5.6 Sol

Claude Fable 5.1 dominates on composite score (77 vs 64), driven by broader benchmark coverage and stronger per-family performance. Claude Fable 5.1 has the higher benchmark mix (77 vs 64). GPT-5.6 Sol is more affordable at $4.0/1M input — about 3× cheaper than $10/1M.

Composite score
Claude Fable 5.177Winner on this rowGPT-5.6 Sol64
Benchmark mix
Claude Fable 5.177Winner on this rowGPT-5.6 Sol64
Context window
Claude Fable 5.11MGPT-5.6 Sol1M
Max output
Claude Fable 5.1128KWinner on this rowGPT-5.6 Sol—
Input price / 1M (lower wins)
Claude Fable 5.1$10GPT-5.6 Sol$4.0Winner on this row
Output speed (AA default API)
Claude Fable 5.167 t/sGPT-5.6 Sol85 t/sWinner on this row

Composite score

Benchmark mix

Context window

Max output

128K

—

Input price / 1M (lower wins)

$10

$4.0

Output speed (AA default API)

67 t/s

85 t/s

Capability grid

What each model can do.

Modalities

Claude Fable 5.1GPT-5.6 Sol

Text●●

Image●●

Audio——

Video——

Code●●

Tool use●●

Reasoning●●

Access

Claude Fable 5.1GPT-5.6 Sol

API●●

Consumer app●●

Open weights——

Managed cloud●●

On-device——

Family profile

Top score per benchmark family.

Knowledge

Reasoning

Coding

Agentic

Long context

Benchmark ranks

Every shared benchmark, side by side.

Knowledge

AA-Omniscience#1/12 · #4/12

67%

59.4%

Reasoning

GPQA Diamond#8/184 · #7/184

93.7%

94.1%

Humanity's Last Exam#2/186 · #9/186

59.1%

49.5%

Coding

SciCode#2/97 · #14/97

63.1%

57.1%

Agentic

Terminal-Bench#1/167 · #7/167

91.39%

88.01%

Long context

AA-LCR#3/184 · #7/184

85.33%

84%

Performance

AA output speed#91/195 · #73/195

67 t/s

85 t/s

Dossier facts

Dates, sources, fineprint.

Claude Fable 5.1GPT-5.6 Sol

ProviderAnthropicOpenAI

FamilyClaude FableGPT-5.6

Release date2026-09-012026-07-09

Knowledge cutoff2026-06-01unpublished

Context window1M1M

Max output128K—

Input price /1M$10$4.0

Output price /1M$50$20

Statussolidflagship

Composite score7764

Intelligence score7764

Intel sourcecompositecomposite

Benchmark rows711

Source count13

Freshnessfreshfresh

Pricing checked2026-09-182026-09-01

Ecosystem

Which tools wrap each model.

Claude Fable 5.1

claude

GPT-5.6 Sol

Not listed in any tool yet.

Verdict

Which model to actually pick.

Open Claude Fable 5.1's dossier Open GPT-5.6 Sol'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 GPT-5.6 Sol?

Is Claude Fable 5.1 or GPT-5.6 Sol cheaper?

Claude Fable 5.1: $10 / $50. GPT-5.6 Sol: $4.0 / $20.

How do the Claude Fable 5.1 and GPT-5.6 Sol context windows compare?

Claude Fable 5.1: 1M. GPT-5.6 Sol: 1M.