VerdictPal · editorial desk · updated 1 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

Grok 4.6 vs GPT-5.6 Sol

Model A

Model B

MODEL A

Grok 4.6

xAI · Grok

Composite 54Intel 6112 rows2 sources

xAI's August 2026 flagship. Artificial Analysis Intelligence Index 60.9 on the high-effort endpoint — tied with GPT-5.6 Sol (max) on the same snapshot. API list price $2 / $6 per 1M tokens.

MODEL B

GPT-5.6 Sol

OpenAI · GPT-5.6

Composite 63Intel 7317 rows5 sources

OpenAI's generally available GPT-5.6 flagship for coding, science, cybersecurity, computer use, and long-horizon agentic work. Promotional API list $4 / $20 per 1M tokens (short context) through 21 Nov 2026.

Grok 4.62stats won

Tied2stats

GPT-5.6 Sol3stats won

Spec showdown

Capacity, price, freshness.

Grok 4.6vsGPT-5.6 Sol

GPT-5.6 Sol holds a narrow composite edge (63 vs 54), but the gap is small enough that other factors matter more. GPT-5.6 Sol has the higher Vals/AA intelligence score (73 vs 61). Grok 4.6 is more affordable at $2.0/1M input — about 2× cheaper than $4.0/1M.

Composite score
Grok 4.654GPT-5.6 Sol63Winner on this row
Intelligence (Vals/AA)
Grok 4.661GPT-5.6 Sol73Winner on this row
Context window
Grok 4.6UnlistedGPT-5.6 SolUnlisted
Max output
Grok 4.6—GPT-5.6 Sol—
Input price / 1M (lower wins)
Grok 4.6$2.0Winner on this rowGPT-5.6 Sol$4.0
Output speed (AA default API)
Grok 4.651 t/sGPT-5.6 Sol77 t/sWinner on this row
Time to first token (AA default API)
Grok 4.635.04sWinner on this rowGPT-5.6 Sol91.64s

Composite score

Intelligence (Vals/AA)

Context window

Unlisted

Max output

—

Input price / 1M (lower wins)

$2.0

$4.0

Output speed (AA default API)

51 t/s

77 t/s

Time to first token (AA default API)

35.04s

91.64s

Capability grid

What each model can do.

Modalities

Grok 4.6GPT-5.6 Sol

Text●●

Image●●

Audio——

Video——

Code●●

Tool use●●

Reasoning●●

Access

Grok 4.6GPT-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#10/12 · #4/12

48.2%

59.4%

Reasoning

Artificial Analysis Intelligence Index#7/184 · #6/184

60.9%

CritPt#12/12 · #1/12

17.1%

32.3%

GPQA Diamond#1/185 · #5/185

94.9%

94.1%

Humanity's Last Exam#19/180 · #6/180

42.9%

49.5%

Coding

SciCode#21/180 · #11/180

53.6%

56.1%

Agentic

Terminal-Bench#2/184 · #4/184

88.39%

88.01%

Terminal-Bench-Science#8/9 · #2/9

7.1%

22.4%

τ³-Bench Banking#2/106 · #10/106

50.72%

44.33%

Long context

AA-LCR#48/179 · #23/179

75%

77.67%

Performance

AA output speed#62/185 · #52/185

51 t/s

77 t/s

AA time to first token#8/185 · #3/185

35.04s

91.64s

Dossier facts

Dates, sources, fineprint.

Grok 4.6GPT-5.6 Sol

ProviderxAIOpenAI

FamilyGrokGPT-5.6

Release date2026-08-122026-07-09

Knowledge cutoffopenunpublished

Context windowUnlistedUnlisted

Max output——

Input price /1M$2.0$4.0

Output price /1M$6.0$20

Statusflagshipflagship

Composite score5463

Intelligence score6173

Intel sourceaavals

Benchmark rows1217

Source count25

Freshnessfreshfresh

Pricing checked2026-08-122026-09-01

Ecosystem

Which tools wrap each model.

Grok 4.6

Not listed in any tool yet.

GPT-5.6 Sol

Not listed in any tool yet.

Verdict

Which model to actually pick.

Open Grok 4.6's dossier Open GPT-5.6 Sol's dossier