What is the difference between GPT-5.1 Chat and Thinking Machines: Inkling?

GPT-5.1 Chat is developed by OpenAI while Thinking Machines: Inkling is developed by Thinking Machines. GPT-5.1 Chat has a 128K token context window vs Thinking Machines: Inkling's 1.0M. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1 Chat or Thinking Machines: Inkling?

It depends on your use case. GPT-5.1 Chat and Thinking Machines: Inkling each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does GPT-5.1 Chat cost compared to Thinking Machines: Inkling?

GPT-5.1 Chat costs $1.25/M input tokens and Thinking Machines: Inkling costs $1/M input tokens. Thinking Machines: Inkling is $0.25/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 GPT-5.1 Chat and Thinking Machines: Inkling on Rival?

This page shows a side-by-side comparison of GPT-5.1 Chat 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 GPT-5.1 Chat and Thinking Machines: Inkling?

GPT-5.1 Chat is developed by OpenAI while Thinking Machines: Inkling is developed by Thinking Machines. GPT-5.1 Chat has a 128K token context window vs Thinking Machines: Inkling's 1.0M. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.1 Chat or Thinking Machines: Inkling?

It depends on your use case. GPT-5.1 Chat and Thinking Machines: Inkling each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

How much does GPT-5.1 Chat cost compared to Thinking Machines: Inkling?

GPT-5.1 Chat costs $1.25/M input tokens and Thinking Machines: Inkling costs $1/M input tokens. Thinking Machines: Inkling is $0.25/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 GPT-5.1 Chat and Thinking Machines: Inkling on Rival?

This page shows a side-by-side comparison of GPT-5.1 Chat 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.

GPT-5.1 Chat vs Thinking Machines: Inkling: Which Is Better?

Updated Jul 2026

Our Verdict

Thinking Machines: Inkling

GPT-5.1 ChatRunner-up

No community votes yet. On paper, Thinking Machines: Inkling has the edge — bigger model tier, newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1 Chat

Input

$1.25

Output

$10.00

Thinking Machines: Inkling

Input

$1.00

1.3× cheaper

Output

$4.05

2.5× cheaper

Thinking Machines: Inkling is cheaper on both — 1.3× input, 2.5× output

Writing DNA

Style Comparison

Similarity

72%

Thinking Machines: Inkling uses 3.9x more emoji

GPT-5.1 Chat

Thinking Machines: Inkling

73%Vocabulary57%

18wSentence Length19w

0.45Hedging0.30

1.1Bold5.0

2.4Lists2.7

0.00Emoji0.04

0.00Headings0.49

0.06Transitions0.06

Based on 15 + 27 text responses

Research

What we learned reading every model

GPT-5.1 Chat 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

GPT-5.1 Chat vs MiniMax M3New provider

GPT-5.1 Chat vs Gemini 3.5 FlashNew provider

GPT-5.1 Chat vs Llama 4 MaverickNew provider

Updated Jul 2026

Our Verdict

Thinking Machines: Inkling

GPT-5.1 ChatRunner-up

No community votes yet. On paper, Thinking Machines: Inkling has the edge — bigger model tier, newer, bigger context window.

Too close to call

API pricing

Cost per 1M tokens

GPT-5.1 Chat

Input

$1.25

Output

$10.00

Thinking Machines: Inkling

Input

$1.00

1.3× cheaper

Output

$4.05

2.5× cheaper

Thinking Machines: Inkling is cheaper on both — 1.3× input, 2.5× output

Writing DNA

Style Comparison

Similarity

72%

Thinking Machines: Inkling uses 3.9x more emoji

GPT-5.1 Chat

Thinking Machines: Inkling

73%Vocabulary57%

18wSentence Length19w

0.45Hedging0.30

1.1Bold5.0

2.4Lists2.7

0.00Emoji0.04

0.00Headings0.49

0.06Transitions0.06

Based on 15 + 27 text responses

Research

What we learned reading every model

GPT-5.1 Chat 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

GPT-5.1 Chat vs MiniMax M3New provider

GPT-5.1 Chat vs Gemini 3.5 FlashNew provider

GPT-5.1 Chat vs Llama 4 MaverickNew provider