GPT-6 Sol vs Grok 4.6

rates, context and capabilities side by side on the impossibl api, and what the same workload costs on each.

the models at a glance: base rates, context window and modalities
specificationGPT-6 Sol

openai/gpt-6-sol

Grok 4.6

xai/grok-4.6

input · usd / 1m tok$2.00$2.00
output · usd / 1m tok$10.00$6.00
context window1.05mtokens500ktokens
modalities · in → out

takes text and image in, gives text out

takes text and image in, gives text out

pricing

base api rates by model
base api rates · usd per 1m tokensGPT-6 Sol

openai/gpt-6-sol

Grok 4.6

xai/grok-4.6

input$2.00over 272k · $4.00$2.00over 200k · $4.00
output$10.00over 272k · $15.00$6.00over 200k · $12.00
cache read$0.20over 272k · $0.40$0.50over 200k · $1.00
cache write · default ttl$2.50over 272k · $5.00not published

brackets are by input tokens per request: a request over a threshold is billed at that bracket's rates for all of its tokens. cache creation can have a separate charge. the estimate below prices one workload at these rates on every model.

specifications

published specifications by model
as publishedGPT-6 Sol

openai/gpt-6-sol

Grok 4.6

xai/grok-4.6

creatorOpenAIxAI
model typeText generationText generation
context window1,050,000tokens500,000tokens
input

takes text and image in, gives text out

takes text and image in, gives text out

outputtexttext
tool callingnot verifiednot verified
releasedsep 22, 2026aug 12, 2026
endpoint/v1/chat/completions/v1/chat/completions

unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.

benchmarks

benchmark scores by model, primary tested configuration
primary configurationGPT-6 Sol

openai/gpt-6-sol

no benchmarks yet

Grok 4.6

xai/grok-4.6

high

intelligence index · gateway ranknot measured44.4#8 of 90
coding indexnot measured76.8#5 of 60
agentic indexnot measured53.4#4 of 49
omnisciencenot measured30.5#6 of 86
gpqanot measured94.9%#3 of 88
humanity’s last examnot measured42.9%#15 of 89
terminal-bench v2.1not measured88.4%#3 of 57
aa-lcrnot measured80.3%
automationbench partialnot measured66.7%
scicodenot measured56.5%
tau bankingnot measured50.7%
analystagentnot measured41.3%
terminal-bench v4.0not measured21.2%
critptnot measured17.1%
gdp.pdf all-passnot measured17.0%
multilingual lcrnot measured12.2%

Grok 4.6 source ↗

each column describes the tested configuration named under the model; performance and costs can differ on impossibl. a score one model was not measured on is left blank rather than scored zero. indices are ranked against every model on the gateway with one. last checked 2026-09-11.

estimate your cost

one token workload, priced on every model at the published rates, in usd. change the numbers to match yours.

token workload

total input, including cached tokens

include billable reasoning tokens

the same token usage in each request

a subset of total input, never additional tokens

GPT-6 Sol

openai/gpt-6-sol

estimated usage cost

$7.00

1,000 requests × (1,000 uncached input × $2.00 + 500 output × $10.00) / 1,000,000 = $7.00

base rates: up to 272,000 input tokens per request, inclusive.

Grok 4.6

xai/grok-4.6

estimated usage cost

$5.00

1,000 requests × (1,000 uncached input × $2.00 + 500 output × $6.00) / 1,000,000 = $5.00

base rates: up to 200,000 input tokens per request, inclusive.

estimates use published impossibl api usage rates. configured billing adjustments, funding fees, taxes, and custom workspace rates are excluded and may change the final amount.

image and audio usage, cache creation, and additional tool charges are excluded. reasoning tokens count as billable output, even when they are not visible in the response.

summary

GPT-6 Sol and Grok 4.6 are available through the Impossibl API. they share the /v1/chat/completions endpoint; the model identifier selects the model for a request.

GPT-6 Sol is created by OpenAI. It has a 1,050,000-token context window. Base API pricing (USD): $2.00 per million input tokens; $10.00 per million output tokens. Above 272,000 input tokens per request, context-tier rates apply to the whole request.

Grok 4.6 is created by xAI. It has a 500,000-token context window. Base API pricing (USD): $2.00 per million input tokens; $6.00 per million output tokens. Above 200,000 input tokens per request, context-tier rates apply to the whole request.

GPT-6 SolGrok 4.6

this page compares GPT-6 Sol vs Grok 4.6 as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes.

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