VerdictPal · editorial desk · updated 23 Sep 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

GPT-6 Sol vs GPT-5.6 Sol

Model A

Model B

MODEL A

GPT-6 Sol

OpenAI · GPT-6

Composite 0Intel 00 rows0 sources

OpenAI's 22 Sep 2026 Sol line. API list $2 / $10 per 1M tokens on short context, 1.05M context, 128K output, knowledge cutoff 20 Apr 2026. No AA or Vals ledger row on this page as of 23 Sep 2026.

MODEL B

GPT-5.6 Sol

OpenAI · GPT-5.6

Composite 62Intel 4717 rows5 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OpenAI's July 2026 GPT-5.6 flagship, superseded as the current OpenAI flagship by GPT-6 Astra on 3 Sep 2026.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. AA Intelligence Index v4.3 is 47.1 at max effort.

GPT-6 Sol4stats won

Tied0stats

GPT-5.6 Sol3stats won

Spec showdown

Capacity, price, freshness.

GPT-6 SolvsGPT-5.6 Sol

GPT-5.6 Sol leads on composite score (62 vs 0), with deeper benchmark coverage across more families. GPT-6 Sol is more affordable at $2.0/1M input — about 2× cheaper than $4.0/1M.

Composite score
GPT-6 Sol0GPT-5.6 Sol62Winner on this row
Intelligence (Vals/AA)
GPT-6 Sol0GPT-5.6 Sol47Winner on this row
Context window
GPT-6 Sol1MWinner on this rowGPT-5.6 Sol1M
Max output
GPT-6 Sol128KWinner on this rowGPT-5.6 Sol—
Input price / 1M (lower wins)
GPT-6 Sol$2.0Winner on this rowGPT-5.6 Sol$4.0
Output speed (AA default API)
GPT-6 Sol—GPT-5.6 Sol73 t/sWinner on this row
Time to first token (AA default API)
GPT-6 Sol—Winner on this rowGPT-5.6 Sol46.07s

Composite score

Intelligence (Vals/AA)

Context window

Max output

128K

—

Input price / 1M (lower wins)

$2.0

$4.0

Output speed (AA default API)

—

73 t/s

Time to first token (AA default API)

—

46.07s

Capability grid

What each model can do.

Modalities

GPT-6 SolGPT-5.6 Sol

Text●●

Image●●

Audio——

Video——

Code●●

Tool use●●

Reasoning●●

Access

GPT-6 SolGPT-5.6 Sol

API●●

Consumer app●●

Open weights——

Managed cloud●●

On-device——

Family profile

Top score per benchmark family.

No shared benchmark families between these two models.

Benchmark ranks

Every shared benchmark, side by side.

No shared benchmarks found between these two models.

Dossier facts

Dates, sources, fineprint.

GPT-6 SolGPT-5.6 Sol

ProviderOpenAIOpenAI

FamilyGPT-6GPT-5.6

Release date2026-09-222026-07-09

Knowledge cutoff2026-04-20unpublished

Context window1M1M

Max output128K—

Input price /1M$2.0$4.0

Output price /1M$10$20

Statusflagshipflagship

Composite score062

Intelligence score047

Intel sourcenoneaa

Benchmark rows017

Source count05

Freshnessstalemixed

Pricing checked2026-09-232026-09-01

Ecosystem

Which tools wrap each model.

GPT-6 Sol

chatgpt

GPT-5.6 Sol

Not listed in any tool yet.

Verdict

Which model to actually pick.

GPT-5.6 Sol leads on composite score (62 vs 0), with deeper benchmark coverage across more families. GPT-6 Sol is more affordable at $2.0/1M input — about 2× cheaper than $4.0/1M.

Open GPT-6 Sol'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 GPT-6 Sol or GPT-5.6 Sol?

GPT-5.6 Sol leads on composite score (62 vs 0), with deeper benchmark coverage across more families. GPT-6 Sol is more affordable at $2.0/1M input — about 2× cheaper than $4.0/1M.

Is GPT-6 Sol or GPT-5.6 Sol cheaper?

GPT-6 Sol: $2.0 / $10. GPT-5.6 Sol: $4.0 / $20.

How do the GPT-6 Sol and GPT-5.6 Sol context windows compare?

GPT-6 Sol: 1M. GPT-5.6 Sol: 1M.