What is the difference between ChatGPT-4o (March 2025) and Thinking Machines: Inkling?

ChatGPT-4o (March 2025) is developed by OpenAI while Thinking Machines: Inkling is developed by Thinking Machines. ChatGPT-4o (March 2025) has a 128K token context window vs Thinking Machines: Inkling's 1.0M. You can compare their actual outputs across 32 challenges on Rival to see how they differ in practice.

Which is better, ChatGPT-4o (March 2025) or Thinking Machines: Inkling?

It depends on your use case. ChatGPT-4o (March 2025) and Thinking Machines: Inkling each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 32 challenges so you can judge which fits your needs best.

How much does ChatGPT-4o (March 2025) cost compared to Thinking Machines: Inkling?

ChatGPT-4o (March 2025) costs $5/M input tokens and Thinking Machines: Inkling costs $1/M input tokens. Thinking Machines: Inkling is $4.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare ChatGPT-4o (March 2025) and Thinking Machines: Inkling on Rival?

This page shows a side-by-side comparison of ChatGPT-4o (March 2025) and Thinking Machines: Inkling across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

What is the difference between ChatGPT-4o (March 2025) and Thinking Machines: Inkling?

ChatGPT-4o (March 2025) is developed by OpenAI while Thinking Machines: Inkling is developed by Thinking Machines. ChatGPT-4o (March 2025) has a 128K token context window vs Thinking Machines: Inkling's 1.0M. You can compare their actual outputs across 32 challenges on Rival to see how they differ in practice.

Which is better, ChatGPT-4o (March 2025) or Thinking Machines: Inkling?

It depends on your use case. ChatGPT-4o (March 2025) and Thinking Machines: Inkling each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 32 challenges so you can judge which fits your needs best.

How much does ChatGPT-4o (March 2025) cost compared to Thinking Machines: Inkling?

ChatGPT-4o (March 2025) costs $5/M input tokens and Thinking Machines: Inkling costs $1/M input tokens. Thinking Machines: Inkling is $4.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare ChatGPT-4o (March 2025) and Thinking Machines: Inkling on Rival?

This page shows a side-by-side comparison of ChatGPT-4o (March 2025) and Thinking Machines: Inkling across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

ChatGPT-4o (March 2025) vs Thinking Machines: Inkling: Which Is Better?

Updated Jul 2026

Our Verdict

ChatGPT-4o (March 2025)

Thinking Machines: Inkling

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Thinking Machines: Inkling is 3.7x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

ChatGPT-4o (March 2025)

Input

$5.00

Output

$15.00

Thinking Machines: Inkling

Input

$1.00

5.0× cheaper

Output

$4.05

3.7× cheaper

Thinking Machines: Inkling is cheaper on both — 5.0× input, 3.7× output

Writing DNA

Style Comparison

Similarity

38%

ChatGPT-4o (March 2025) uses 24.4x more emoji

ChatGPT-4o (March 2025)

Thinking Machines: Inkling

55%Vocabulary57%

24wSentence Length19w

0.52Hedging0.30

3.3Bold5.0

6.0Lists2.7

0.94Emoji0.04

0.63Headings0.49

0.05Transitions0.06

Based on 15 + 27 text responses

Research

What we learned reading every model

ChatGPT-4o (March 2025) and Thinking Machines: Inkling have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

ChatGPT-4o (March 2025) vs MiniMax M3New provider

ChatGPT-4o (March 2025) vs Llama 4 MaverickNew provider

ChatGPT-4o (March 2025) vs Claude Opus 4New provider

Updated Jul 2026

Our Verdict

ChatGPT-4o (March 2025)

Thinking Machines: Inkling

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Thinking Machines: Inkling is 3.7x cheaper per token — worth considering if cost matters.

Too close to call

API pricing

Cost per 1M tokens

ChatGPT-4o (March 2025)

Input

$5.00

Output

$15.00

Thinking Machines: Inkling

Input

$1.00

5.0× cheaper

Output

$4.05

3.7× cheaper

Thinking Machines: Inkling is cheaper on both — 5.0× input, 3.7× output

Writing DNA

Style Comparison

Similarity

38%

ChatGPT-4o (March 2025) uses 24.4x more emoji

ChatGPT-4o (March 2025)

Thinking Machines: Inkling

55%Vocabulary57%

24wSentence Length19w

0.52Hedging0.30

3.3Bold5.0

6.0Lists2.7

0.94Emoji0.04

0.63Headings0.49

0.05Transitions0.06

Based on 15 + 27 text responses

Research

What we learned reading every model

ChatGPT-4o (March 2025) and Thinking Machines: Inkling have opinions about your brand too.Ask 10 models what they tell people about you. Verbatim receipts.Run the mirror

FAQ

Common questions

Keep exploring

More comparisons

ChatGPT-4o (March 2025) vs MiniMax M3New provider

ChatGPT-4o (March 2025) vs Llama 4 MaverickNew provider

ChatGPT-4o (March 2025) vs Claude Opus 4New provider