VerdictPal · editorial desk · updated 5 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-6 Astra

Model A

Model B

MODEL A

Grok 4.6

xAI · Grok

Composite 53Intel 5112 rows2 sources

xAI's August 2026 flagship. Live AA Intelligence Index v4.2 is 51 at high effort — tied with GPT-5.6 Sol (max) on the same v4.2 board. API list $2 / $6 per 1M tokens; AA now lists a 500k context window.

MODEL B

GPT-6 Astra

OpenAI · GPT-6

Composite 60Intel 674 rows2 sources

OpenAI's 3 Sep 2026 flagship. API list $10 / $50 per 1M tokens, 1.05M context, 128K output, knowledge cutoff 30 Apr 2026. Vals Index 66.61% on the live board; AA Intelligence Index v4.2 is 55 at max effort. ChatGPT ships it as GPT-6 Pro on eligible plans.

Grok 4.62stats won

Tied0stats

GPT-6 Astra5stats won

Spec showdown

Capacity, price, freshness.

Grok 4.6vsGPT-6 Astra

GPT-6 Astra holds a narrow composite edge (60 vs 53), but the gap is small enough that other factors matter more. GPT-6 Astra has the higher Vals/AA intelligence score (67 vs 51). Grok 4.6 is significantly cheaper at $2.0/1M input vs $10/1M input. GPT-6 Astra's 1M context window dwarfs Grok 4.6's 500K — a meaningful difference for long-document or codebase work.

Composite score
Grok 4.653GPT-6 Astra60Winner on this row
Intelligence (Vals/AA)
Grok 4.651GPT-6 Astra67Winner on this row
Context window
Grok 4.6500KGPT-6 Astra1MWinner on this row
Max output
Grok 4.6—GPT-6 Astra128KWinner on this row
Input price / 1M (lower wins)
Grok 4.6$2.0Winner on this rowGPT-6 Astra$10
Output speed (AA default API)
Grok 4.651 t/sGPT-6 Astra64 t/sWinner on this row
Time to first token (AA default API)
Grok 4.635.04sWinner on this rowGPT-6 Astra384.30s

Composite score

Intelligence (Vals/AA)

Context window

500K

Max output

—

128K

Input price / 1M (lower wins)

$2.0

$10

Output speed (AA default API)

51 t/s

64 t/s

Time to first token (AA default API)

35.04s

384.30s

Capability grid

What each model can do.

Modalities

Grok 4.6GPT-6 Astra

Text●●

Image●●

Audio——

Video——

Code●●

Tool use●●

Reasoning●●

Access

Grok 4.6GPT-6 Astra

API●●

Consumer app●●

Open weights——

Managed cloud●●

On-device——

Family profile

Top score per benchmark family.

Reasoning

Agentic

Benchmark ranks

Every shared benchmark, side by side.

Reasoning

Artificial Analysis Intelligence Index#35/187 · #18/187

51%

55%

Performance

AA output speed#64/187 · #57/187

51 t/s

64 t/s

AA time to first token#9/186 · #1/186

35.04s

384.30s

Dossier facts

Dates, sources, fineprint.

Grok 4.6GPT-6 Astra

ProviderxAIOpenAI

FamilyGrokGPT-6

Release date2026-08-122026-09-03

Knowledge cutoffopen2026-04-30

Context window500K1M

Max output—128K

Input price /1M$2.0$10

Output price /1M$6.0$50

Statusflagshipflagship

Composite score5360

Intelligence score5167

Intel sourceaavals

Benchmark rows124

Source count22

Freshnessfreshfresh

Pricing checked2026-09-052026-09-05

Ecosystem

Which tools wrap each model.

Grok 4.6

Not listed in any tool yet.

GPT-6 Astra

chatgpt

Verdict

Which model to actually pick.

Open Grok 4.6's dossier Open GPT-6 Astra's dossier