Model Comparator

Compare up to four models using the same criteria.

GPT-5.5 (High)
OpenAI
GPT-5.6 Luna (Max)
OpenAI

Differences only

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

Model Comparator
Metrics	GPT-5.5 (High) OpenAI	GPT-5.6 Luna (Max) OpenAI
Intelligence	37	Best: 37.3
Coding	Best: 71.6	71.4
Agentic	34.3	Best: 42.1
Speed	82.7 t/s	Best: 115 t/s
TTFT	Best: 33.6 s	121 s
Input · $ / 1M tokens	$5×25 relative to the lowest price among the compared models	Best: $0.20
Output · $ / 1M tokens	$30×25 relative to the lowest price among the compared models	Best: $1.20
Context window	922K	Best: 1M
Reasoning	Yes	Yes
Open weights	No	No
Cost / task	$1.54×8.6 relative to the lowest price among the compared models	Best: $0.178

Intelligence

GPT-5.5 (High): 37
GPT-5.6 Luna (Max): Best: 37.3

Coding

GPT-5.5 (High): Best: 71.6
GPT-5.6 Luna (Max): 71.4

Agentic

GPT-5.5 (High): 34.3
GPT-5.6 Luna (Max): Best: 42.1

Speed

GPT-5.5 (High): 82.7 t/s
GPT-5.6 Luna (Max): Best: 115 t/s

TTFT

GPT-5.5 (High): Best: 33.6 s
GPT-5.6 Luna (Max): 121 s

Input · $ / 1M tokens

GPT-5.5 (High): $5×25 relative to the lowest price among the compared models
GPT-5.6 Luna (Max): Best: $0.20

Output · $ / 1M tokens

GPT-5.5 (High): $30×25 relative to the lowest price among the compared models
GPT-5.6 Luna (Max): Best: $1.20

Context window

GPT-5.5 (High): 922K
GPT-5.6 Luna (Max): Best: 1M

Reasoning

GPT-5.5 (High): Yes
GPT-5.6 Luna (Max): Yes

Open weights

GPT-5.5 (High): No
GPT-5.6 Luna (Max): No

Cost / task

GPT-5.5 (High): $1.54×8.6 relative to the lowest price among the compared models
GPT-5.6 Luna (Max): Best: $0.178

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-5.5 (High)37 · $1.54
GPT-5.6 Luna (Max)37.3 · $0.178