What is the difference between Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol?

Z.ai: GLM 5.1 is developed by Z-ai while OpenAI: GPT-5.6 Sol is developed by OpenAI. Z.ai: GLM 5.1 has a 203K token context window vs OpenAI: GPT-5.6 Sol's 1.1M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Z.ai: GLM 5.1 or OpenAI: GPT-5.6 Sol?

It depends on your use case. Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Z.ai: GLM 5.1 cost compared to OpenAI: GPT-5.6 Sol?

Z.ai: GLM 5.1 costs $1.4/M input tokens and OpenAI: GPT-5.6 Sol costs $5/M input tokens. Z.ai: GLM 5.1 is $3.60/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 Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol 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 Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol?

Z.ai: GLM 5.1 is developed by Z-ai while OpenAI: GPT-5.6 Sol is developed by OpenAI. Z.ai: GLM 5.1 has a 203K token context window vs OpenAI: GPT-5.6 Sol's 1.1M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Z.ai: GLM 5.1 or OpenAI: GPT-5.6 Sol?

It depends on your use case. Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Z.ai: GLM 5.1 cost compared to OpenAI: GPT-5.6 Sol?

Z.ai: GLM 5.1 costs $1.4/M input tokens and OpenAI: GPT-5.6 Sol costs $5/M input tokens. Z.ai: GLM 5.1 is $3.60/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 Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol on Rival?

This page shows a side-by-side comparison of Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol 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.

Z.ai: GLM 5.1 vs OpenAI: GPT-5.6 Sol: Which Is Better?

Updated Jul 2026

Our Verdict

OpenAI: GPT-5.6 Sol

Z.ai: GLM 5.1Runner-up

No community votes yet. On paper, OpenAI: GPT-5.6 Sol has the edge — bigger model tier, newer, bigger context window, major provider backing.

Z.ai: GLM 5.1 is 6.8x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Z.ai: GLM 5.1

Input

$1.40

3.6× cheaper

Output

$4.40

6.8× cheaper

OpenAI: GPT-5.6 Sol

Input

$5.00

Output

$30.00

Z.ai: GLM 5.1 is cheaper on both — 3.6× input, 6.8× output

Writing DNA

Style Comparison

Similarity

32%

OpenAI: GPT-5.6 Sol uses 3.3x more emoji

Z.ai: GLM 5.1

OpenAI: GPT-5.6 Sol

54%Vocabulary63%

18wSentence Length15w

0.31Hedging0.79

3.6Bold3.4

2.6Lists3.8

0.00Emoji0.03

0.43Headings0.95

0.11Transitions0.08

Based on 27 + 27 text responses

Research

What we learned reading every model

Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol 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

Z.ai: GLM 5.1 vs MiniMax M3New provider

Z.ai: GLM 5.1 vs Claude Opus 4.1New provider

Z.ai: GLM 5.1 vs GPT-5Cross-provider

Updated Jul 2026

Our Verdict

OpenAI: GPT-5.6 Sol

Z.ai: GLM 5.1Runner-up

No community votes yet. On paper, OpenAI: GPT-5.6 Sol has the edge — bigger model tier, newer, bigger context window, major provider backing.

Z.ai: GLM 5.1 is 6.8x cheaper per token — worth considering if cost matters.

Slight edge

API pricing

Cost per 1M tokens

Z.ai: GLM 5.1

Input

$1.40

3.6× cheaper

Output

$4.40

6.8× cheaper

OpenAI: GPT-5.6 Sol

Input

$5.00

Output

$30.00

Z.ai: GLM 5.1 is cheaper on both — 3.6× input, 6.8× output

Writing DNA

Style Comparison

Similarity

32%

OpenAI: GPT-5.6 Sol uses 3.3x more emoji

Z.ai: GLM 5.1

OpenAI: GPT-5.6 Sol

54%Vocabulary63%

18wSentence Length15w

0.31Hedging0.79

3.6Bold3.4

2.6Lists3.8

0.00Emoji0.03

0.43Headings0.95

0.11Transitions0.08

Based on 27 + 27 text responses

Research

What we learned reading every model

Z.ai: GLM 5.1 and OpenAI: GPT-5.6 Sol 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

Z.ai: GLM 5.1 vs MiniMax M3New provider

Z.ai: GLM 5.1 vs Claude Opus 4.1New provider

Z.ai: GLM 5.1 vs GPT-5Cross-provider