Model Comparator

Compare up to four models using the same criteria.

GPT-6 Luna (Xhigh)
OpenAI
GPT-5.1 Codex (High)
OpenAI

Differences only

✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.

Model Comparator
Metrics	GPT-6 Luna (Xhigh) OpenAI	GPT-5.1 Codex (High) OpenAI
Intelligence	23.5	Best: 23.7
Math	—	95.7
Speed	119 t/s	Best: 126 t/s
TTFT	33.7 s	Best: 10.4 s
Input · $ / 1M tokens	Best: $0.10	$1.25×12.5 relative to the lowest price among the compared models
Output · $ / 1M tokens	Best: $0.50	$10×20 relative to the lowest price among the compared models
Context window	1M	1M
Reasoning	Yes	Yes
Open weights	No	No
Cost / task	$0.104	—

Intelligence

GPT-6 Luna (Xhigh): 23.5
GPT-5.1 Codex (High): Best: 23.7

Math

GPT-6 Luna (Xhigh): —
GPT-5.1 Codex (High): 95.7

Speed

GPT-6 Luna (Xhigh): 119 t/s
GPT-5.1 Codex (High): Best: 126 t/s

TTFT

GPT-6 Luna (Xhigh): 33.7 s
GPT-5.1 Codex (High): Best: 10.4 s

Input · $ / 1M tokens

GPT-6 Luna (Xhigh): Best: $0.10
GPT-5.1 Codex (High): $1.25×12.5 relative to the lowest price among the compared models

Output · $ / 1M tokens

GPT-6 Luna (Xhigh): Best: $0.50
GPT-5.1 Codex (High): $10×20 relative to the lowest price among the compared models

Context window

GPT-6 Luna (Xhigh): 1M
GPT-5.1 Codex (High): 1M

Reasoning

GPT-6 Luna (Xhigh): Yes
GPT-5.1 Codex (High): Yes

Open weights

GPT-6 Luna (Xhigh): No
GPT-5.1 Codex (High): No

Cost / task

GPT-6 Luna (Xhigh): $0.104
GPT-5.1 Codex (High): —

Each reasoning level remains a separate configuration.

Score and cost

Each line joins the reasoning levels of a compared model; the large point marks the configuration in the table. The top-right corner holds the best score for the lowest cost. Select another point to compare that level.

GPT-6 Luna (Xhigh)23.5 · $0.20
GPT-5.1 Codex (High)23.7 · $3.44