OpenRouter Fusion · Quality (Jun 2026) vs GPT-5.1-Codex
Compare OpenRouter Fusion · Quality (Jun 2026) by OpenRouter against GPT-5.1-Codex by OpenAI, context windows of 256K vs 400K, tested across 52 shared challenges.
Our Verdict
OpenRouter Fusion · Quality (Jun 2026)
GPT-5.1-Codex
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Too close to call
API pricing
Cost per 1M tokens
OpenRouter Fusion · Quality (Jun 2026)
Input
—
Output
—
GPT-5.1-Codex
Input
$1.25
Output
$10.00
Writing DNA
Style Comparison
Similarity
35%
OpenRouter Fusion · Quality (Jun 2026) uses 68.0x more emoji
OpenRouter Fusion · Quality (Jun 2026)
GPT-5.1-Codex
55%Vocabulary70%
21wSentence Length17w
0.47Hedging0.39
4.0Bold3.4
2.0Lists3.5
0.68Emoji0.00
0.73Headings0.50
0.09Transitions0.38
Based on 27 + 14 text responses
Research
What we learned reading every model
FAQ
