OpenAI: GPT-5.6 Terra vs Grok 4.20 Multi-Agent Beta
Compare OpenAI: GPT-5.6 Terra by OpenAI against Grok 4.20 Multi-Agent Beta by xAI, context windows of 1.1M vs 2.0M, tested across 53 shared challenges.
Our Verdict
Grok 4.20 Multi-Agent Beta
OpenAI: GPT-5.6 TerraRunner-up
No community votes yet. On paper, Grok 4.20 Multi-Agent Beta has the edge — bigger model tier, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Terra
Input
$2.50
Output
$15.00
Grok 4.20 Multi-Agent Beta
Input
$2.00
1.3× cheaper
Output
$6.00
2.5× cheaper
Grok 4.20 Multi-Agent Beta is cheaper on both — 1.3× input, 2.5× output
Writing DNA
Style Comparison
Similarity
62%
OpenAI: GPT-5.6 Terra uses 4.3x more headings
OpenAI: GPT-5.6 Terra
Grok 4.20 Multi-Agent Beta
57%Vocabulary59%
18wSentence Length16w
0.85Hedging0.41
2.8Bold2.7
4.6Lists2.4
0.00Emoji0.00
1.12Headings0.26
0.06Transitions0.02
Based on 27 + 23 text responses
Research
What we learned reading every model
FAQ
