Model Comparator

Compare up to four models using the same criteria.

GPT-5.4 (Xhigh)
OpenAI
Grok 4.5 (High)
SpaceXSI

Differences only

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

Model Comparator
Metrics	GPT-5.4 (Xhigh) OpenAI	Grok 4.5 (High) SpaceXSI
Intelligence	Best: 39	38.8
Coding	71.1	Best: 72.4
Agentic	—	41.2
Speed	Best: 90.7 t/s	62.7 t/s
TTFT	144 s	Best: 5.57 s
Input · $ / 1M tokens	$2.50×1.3 relative to the lowest price among the compared models	Best: $2
Output · $ / 1M tokens	$15×2.5 relative to the lowest price among the compared models	Best: $6
Context window	Best: 1.1M	500K
Reasoning	Yes	Yes
Open weights	No	No
Cost / task	—	$0.881

Intelligence

GPT-5.4 (Xhigh): Best: 39
Grok 4.5 (High): 38.8

Coding

GPT-5.4 (Xhigh): 71.1
Grok 4.5 (High): Best: 72.4

Agentic

GPT-5.4 (Xhigh): —
Grok 4.5 (High): 41.2

Speed

GPT-5.4 (Xhigh): Best: 90.7 t/s
Grok 4.5 (High): 62.7 t/s

TTFT

GPT-5.4 (Xhigh): 144 s
Grok 4.5 (High): Best: 5.57 s

Input · $ / 1M tokens

GPT-5.4 (Xhigh): $2.50×1.3 relative to the lowest price among the compared models
Grok 4.5 (High): Best: $2

Output · $ / 1M tokens

GPT-5.4 (Xhigh): $15×2.5 relative to the lowest price among the compared models
Grok 4.5 (High): Best: $6

Context window

GPT-5.4 (Xhigh): Best: 1.1M
Grok 4.5 (High): 500K

Reasoning

GPT-5.4 (Xhigh): Yes
Grok 4.5 (High): Yes

Open weights

GPT-5.4 (Xhigh): No
Grok 4.5 (High): No

Cost / task

GPT-5.4 (Xhigh): —
Grok 4.5 (High): $0.881

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-5.4 (Xhigh)39 · $5.63
Grok 4.5 (High)38.8 · $3