What is the difference between Claude Opus 4.6 and GPT-5.3 Chat?

Claude Opus 4.6 is developed by Anthropic while GPT-5.3 Chat is developed by OpenAI. Claude Opus 4.6 has a 1.0M token context window vs GPT-5.3 Chat's 128K. in 7 community votes on Rival, Claude Opus 4.6 wins 75% of head-to-head matchups. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude Opus 4.6 or GPT-5.3 Chat?

Based on 7 community votes on Rival, Claude Opus 4.6 wins 75% of head-to-head matchups against GPT-5.3 Chat. Claude Opus 4.6 is strongest in Reasoning.

How much does Claude Opus 4.6 cost compared to GPT-5.3 Chat?

Claude Opus 4.6 costs $5/M input tokens and GPT-5.3 Chat costs $1.75/M input tokens. GPT-5.3 Chat is $3.25/M cheaper per input. The more expensive model wins 75% of duels, so the premium may be justified by quality.

How are Claude Opus 4.6 vs GPT-5.3 Chat votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 7 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

What is the difference between Claude Opus 4.6 and GPT-5.3 Chat?

Claude Opus 4.6 is developed by Anthropic while GPT-5.3 Chat is developed by OpenAI. Claude Opus 4.6 has a 1.0M token context window vs GPT-5.3 Chat's 128K. in 7 community votes on Rival, Claude Opus 4.6 wins 75% of head-to-head matchups. These results are based on blind head-to-head voting across 53 challenges.

Which is better, Claude Opus 4.6 or GPT-5.3 Chat?

Based on 7 community votes on Rival, Claude Opus 4.6 wins 75% of head-to-head matchups against GPT-5.3 Chat. Claude Opus 4.6 is strongest in Reasoning.

How much does Claude Opus 4.6 cost compared to GPT-5.3 Chat?

Claude Opus 4.6 costs $5/M input tokens and GPT-5.3 Chat costs $1.75/M input tokens. GPT-5.3 Chat is $3.25/M cheaper per input. The more expensive model wins 75% of duels, so the premium may be justified by quality.

How are Claude Opus 4.6 vs GPT-5.3 Chat votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 7 votes have been collected for this pair across 53 challenges. All vote data is part of Rival's open dataset.

Claude Opus 4.6 vs GPT-5.3 Chat: Which Is Better?

Updated Mar 2026

Our Verdict

Claude Opus 4.6Winner

GPT-5.3 ChatRunner-up

Pick Claude Opus 4.6. In 7 blind votes, Claude Opus 4.6 wins 75% of the time. That's not luck.

Claude Opus 4.6 particularly excels in Reasoning.

Clear winner

API pricing

Cost per 1M tokens

Claude Opus 4.6

Input

$5.00

Output

$25.00

GPT-5.3 Chat

Input

$1.75

2.9× cheaper

Output

$14.00

1.8× cheaper

GPT-5.3 Chat is cheaper on both — 2.9× input, 1.8× output

Writing DNA

Style Comparison

Similarity

57%

Claude Opus 4.6 uses 20.7x more emoji

Claude Opus 4.6

GPT-5.3 Chat

53%Vocabulary59%

35wSentence Length26w

0.68Hedging0.84

5.2Bold1.7

2.9Lists6.6

0.21Emoji0.00

1.34Headings0.00

0.03Transitions0.25

Based on 23 + 23 text responses

Research

What we learned reading every model

Claude Opus 4.6 and GPT-5.3 Chat 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-5.3 Chat vs MiniMax M3New provider

Claude Opus 4.6 vs Grok 3New provider

Claude Opus 4.6 vs Llama 4 MaverickNew provider

Updated Mar 2026

Our Verdict

Claude Opus 4.6Winner

GPT-5.3 ChatRunner-up

Pick Claude Opus 4.6. In 7 blind votes, Claude Opus 4.6 wins 75% of the time. That's not luck.

Claude Opus 4.6 particularly excels in Reasoning.

Clear winner

API pricing

Cost per 1M tokens

Claude Opus 4.6

Input

$5.00

Output

$25.00

GPT-5.3 Chat

Input

$1.75

2.9× cheaper

Output

$14.00

1.8× cheaper

GPT-5.3 Chat is cheaper on both — 2.9× input, 1.8× output

Writing DNA

Style Comparison

Similarity

57%

Claude Opus 4.6 uses 20.7x more emoji

Claude Opus 4.6

GPT-5.3 Chat

53%Vocabulary59%

35wSentence Length26w

0.68Hedging0.84

5.2Bold1.7

2.9Lists6.6

0.21Emoji0.00

1.34Headings0.00

0.03Transitions0.25

Based on 23 + 23 text responses

Research

What we learned reading every model

Claude Opus 4.6 and GPT-5.3 Chat 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-5.3 Chat vs MiniMax M3New provider

Claude Opus 4.6 vs Grok 3New provider

Claude Opus 4.6 vs Llama 4 MaverickNew provider