GPT-5.3-Codex vs Thinking Machines: Inkling
Compare GPT-5.3-Codex by OpenAI against Thinking Machines: Inkling by Thinking Machines, context windows of 400K vs 1.0M, tested across 53 shared challenges.
Our Verdict
GPT-5.3-Codex
Thinking Machines: Inkling
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Thinking Machines: Inkling is 3.5x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.3-Codex
Input
$1.75
Output
$14.00
Thinking Machines: Inkling
Input
$1.00
1.8× cheaper
Output
$4.05
3.5× cheaper
Thinking Machines: Inkling is cheaper on both — 1.8× input, 3.5× output
Writing DNA
Style Comparison
Similarity
48%
GPT-5.3-Codex uses 4.1x more emoji
GPT-5.3-Codex
Thinking Machines: Inkling
65%Vocabulary57%
23wSentence Length19w
0.51Hedging0.30
6.5Bold5.0
6.2Lists2.7
0.16Emoji0.04
1.90Headings0.49
0.03Transitions0.06
Based on 23 + 27 text responses
Research
What we learned reading every model
FAQ
