Inkling vs Grok 4.20

Inkling at $1.09 in and $4.66 out and Grok 4.20 at $1.44 in and $2.88 out — per million tokens, from the same wallet.

Inkling

Thinkingmachines

0.92¢

for a client proposal

$1.09 in · $4.66 out / 1M

524K context · released 3 weeks ago

Full page →

Grok 4.20

xAI

0.95¢

for a client proposal

$1.44 in · $2.88 out / 1M

2M context · released 4 months ago

Full page →

Asking all both at once — identical prompt, identical context — costs about 1.9¢ for a typical client proposal.

At a glance

Cheapest input: Inkling at $1.09 per million tokens.
Cheapest output: Grok 4.20 at $2.88 per million tokens.
Largest context: Grok 4.20 at 2M tokens — about 2,900 pages.

Cost per task

Estimated totals at the rates above. Solid bar is input, lighter bar is output.

Quick code fix

2K in · 500 out

Inkling

0.45¢

Grok 4.20

0.43¢

Draft a client proposal from notes

5K in · 800 out

Inkling

0.92¢

Grok 4.20

0.95¢

Context-heavy session (Alyph workspace)

155K in · 4K out

Inkling

$0.19

Grok 4.20

$0.23

Analyze a 50-page legal contract

35K in · 1K out

Inkling

4.3¢

Grok 4.20

$0.05

Large architecture refactor

250K in · 3K out

Inkling

$0.29

Grok 4.20

$0.74

Long-context rate applied at this input size.

Solid part of each bar is input tokens, the lighter part is output. Models that don’t fit a task are marked instead of priced.

Cost vs Token Amount

Drag the slider to adjust the split between input and output workload.

80% Input20% Output

Inkling

Grok 4.20

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

Pricing

Inkling

Grok 4.20

Input / 1M tokens

$1.09

$1.44

Output / 1M tokens

$4.66

$2.88

Cached input / 1M

$0.184

$0.230

Web search

—

0.57¢ / search

Specs

Inkling

Grok 4.20

Provider

Thinkingmachines

xAI

Released

3 weeks ago

4 months ago

Context window

524K

Max output

262K

—

Input

Text, Images, and Audio

Text, Images, and Files

Output

Text

Reasoning

Shows its thinking

Knowledge cutoff

—

2025-09-01

Try it with real numbers

2K tokens in · 500 tokens out.

Inkling

Thinkingmachines

0.45¢

for this task

48% input · 52% output

Full pricing →

Grok 4.20

xAI

0.43¢

for this task

67% input · 33% output

Full pricing →

All 2, same prompt and context: 0.88¢. That is the entire cost of the comparison.

Your $5 welcome credit covers about 566 of these.

Which should you pick?

For long documents, Grok 4.20 has the largest context window here — 2M tokens.

On price, Inkling is the cheapest of the two on a typical task, at about 0.92¢.

Or don’t pick. Send the identical prompt to all both, read the answers side by side, and keep the winner. How to run a fair bake-off →

Inkling pricing →Grok 4.20 pricing →Add Lyria 3 Clip Preview Add Grok 4.20 Multi-Agent

Questions, answered

Which is cheaper, Inkling or Grok 4.20?

On a typical client proposal (5K tokens in, 800 out): Inkling at 0.92¢; Grok 4.20 at 0.95¢. Long prompts can change the order when long-context rates apply.

Which has the largest context window?

Grok 4.20 — 2M tokens, about 2,900 pages.

Can I run Inkling and Grok 4.20 side by side on Alyph?

Yes — that is what Alyph is built for: the identical prompt with identical context to all 2, answers rendered side by side, billed from one wallet. This exact combination costs about 1.9¢ for a typical task.

Ask both at once

Identical prompt, identical context, answers side by side — about 1.9¢ for a typical client proposal. Free to start, with $5 of credit.