Text generation / Thinking Machines

Inkling 256K

Inkling 256K is a text generation model from Thinking Machines, available through the Impossibl API. Its published context window is 262,144 tokens. The advertised input rate is $3.74 per million input tokens. The advertised output rate is $9.36 per million output tokens.

api id: thinkingmachines/inkling-256k

model as markdown ↗
start building →find another model

how much does inkling 256k cost?

published base api rates · usd per 1m tokens

input
$3.74
output
$9.36
cache read
$0.748

rates are published by the impossibl api. balance-purchase fees, taxes, tool charges, and workspace-specific pricing are separate.

specifications & capabilities

creator
Thinking Machines
model type
Text generation
context window
262.14k tokens
maximum output
not published in the catalog
input types
text, image
output types
text
tool calling
not verified in the catalog

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

published endpoint

/v1/chat/completions

see the model documentation for integration details.

estimate your usage

estimate your api cost

estimate text token usage for your workload. all amounts are in usd.

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

Inkling 256K

$8.42

estimated usage cost

1,000 requests × (1,000 uncached input × $3.74 + 500 output × $9.36) / 1,000,000 = $8.42

base rates; no context pricing tiers are published.

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.

compare more Text generation models

independent benchmarks

Benchmark results are not available for this model yet.

frequently asked questions

What is Inkling 256K?

Inkling 256K is a text-generation model from Thinking Machines, available through the Impossibl API.

How much does Inkling 256K cost?

Inkling 256K costs $3.74 per million input tokens and $9.36 per million output tokens through the Impossibl API. Cache reads cost $0.748 per million tokens. All rates are in USD.

view the pricing table ↑

What is the context length of Inkling 256K?

Inkling 256K has a 262,144-token context window through the Impossibl API.

What inputs and outputs does Inkling 256K support?

Inkling 256K accepts text and image as input. Inkling 256K returns text.

How do I use Inkling 256K through an API?

Inkling 256K is available through the Impossibl API. Use thinkingmachines/inkling-256k as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.

follow the api quickstart →

When was Inkling 256K released?

Thinking Machines released Inkling 256K on July 15, 2026.

sources & coverage

this page describes Inkling 256K 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.

view the source catalog ↗

model descriptions and release dates, where available, use the creator sources linked in the faq. api prices and limits use the impossibl catalog. benchmark results, where available, are credited to Artificial Analysis in the benchmarks section. report a correction →