What is the difference between GPT-5.6 Sol and Mercury?

GPT-5.6 Sol is developed by OpenAI while Mercury is developed by Inception. GPT-5.6 Sol has a 1.1M token context window vs Mercury's 32K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.6 Sol or Mercury?

It depends on your use case. GPT-5.6 Sol and Mercury each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does GPT-5.6 Sol cost compared to Mercury?

GPT-5.6 Sol costs $5/M input tokens and Mercury costs $10/M input tokens. GPT-5.6 Sol is $5.00/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 GPT-5.6 Sol and Mercury on Rival?

This page shows a side-by-side comparison of GPT-5.6 Sol and Mercury 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-5.6 Sol and Mercury?

GPT-5.6 Sol is developed by OpenAI while Mercury is developed by Inception. GPT-5.6 Sol has a 1.1M token context window vs Mercury's 32K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, GPT-5.6 Sol or Mercury?

It depends on your use case. GPT-5.6 Sol and Mercury each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does GPT-5.6 Sol cost compared to Mercury?

GPT-5.6 Sol costs $5/M input tokens and Mercury costs $10/M input tokens. GPT-5.6 Sol is $5.00/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 GPT-5.6 Sol and Mercury on Rival?

This page shows a side-by-side comparison of GPT-5.6 Sol and Mercury 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-5.6 Sol vs Mercury: Which Is Better?

Updated Jul 2026

Our Verdict

GPT-5.6 Sol

MercuryRunner-up

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

Mercury is 3.0x cheaper per token — worth considering if cost matters.

Slight edge

What do GPT-5.6 Sol and Mercury say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.6 Sol

Input

$5.00

2.0× cheaper

Output

$30.00

Mercury

Input

$10.00

Output

$10.00

3.0× cheaper

GPT-5.6 Sol wins input (2.0× cheaper)·Mercury wins output (3.0× cheaper)

Writing DNA

Style Comparison

Similarity

53%

Mercury uses 2.6x more sentence length

GPT-5.6 Sol

Mercury

63%Vocabulary55%

15wSentence Length40w

0.79Hedging0.39

3.4Bold4.9

3.8Lists3.8

0.03Emoji0.04

0.95Headings1.04

0.08Transitions0.03

Based on 27 + 17 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Mercury vs MiniMax M3New provider

Mercury vs Claude Opus 4.1New provider

Mercury vs Ox AlphaNew provider

Updated Jul 2026

Our Verdict

GPT-5.6 Sol

MercuryRunner-up

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

Mercury is 3.0x cheaper per token — worth considering if cost matters.

Slight edge

What do GPT-5.6 Sol and Mercury say about your brand?

10 models, one question, verbatim receipts.

or peek at a demo: Notion Linear Vercel

API pricing

Cost per 1M tokens

GPT-5.6 Sol

Input

$5.00

2.0× cheaper

Output

$30.00

Mercury

Input

$10.00

Output

$10.00

3.0× cheaper

GPT-5.6 Sol wins input (2.0× cheaper)·Mercury wins output (3.0× cheaper)

Writing DNA

Style Comparison

Similarity

53%

Mercury uses 2.6x more sentence length

GPT-5.6 Sol

Mercury

63%Vocabulary55%

15wSentence Length40w

0.79Hedging0.39

3.4Bold4.9

3.8Lists3.8

0.03Emoji0.04

0.95Headings1.04

0.08Transitions0.03

Based on 27 + 17 text responses

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Mercury vs MiniMax M3New provider

Mercury vs Claude Opus 4.1New provider

Mercury vs Ox AlphaNew provider