Claude 3.7 Thinking Sonnet vs GPT-5.1 Chat
Compare Claude 3.7 Thinking Sonnet by Anthropic against GPT-5.1 Chat by OpenAI, context windows of 200K vs 128K, tested across 53 shared challenges.
Our Verdict
Claude 3.7 Thinking Sonnet
GPT-5.1 Chat
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-5.1 Chat is 3.0x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude 3.7 Thinking Sonnet
Input
$6.00
Output
$30.00
GPT-5.1 Chat
Input
$1.25
4.8× cheaper
Output
$10.00
3.0× cheaper
GPT-5.1 Chat is cheaper on both — 4.8× input, 3.0× output
Writing DNA
Style Comparison
Similarity
54%
Claude 3.7 Thinking Sonnet uses 180.6x more headings
Claude 3.7 Thinking Sonnet
GPT-5.1 Chat
61%Vocabulary73%
49wSentence Length18w
0.64Hedging0.45
2.2Bold1.1
4.5Lists2.4
0.00Emoji0.00
1.81Headings0.00
0.21Transitions0.06
Based on 21 + 15 text responses
Research
What we learned reading every model
FAQ
