Model Comparator

Compare up to four models using the same criteria.

Grok 4.5 (High)
SpaceXSI
GPT-5.5 (Xhigh)
OpenAI

Differences only

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

Model Comparator
Metrics	Grok 4.5 (High) SpaceXSI	GPT-5.5 (Xhigh) OpenAI
Intelligence	Best: 38.8	38.4
Coding	72.4	Best: 74.9
Agentic	Best: 41.2	36.4
Speed	56.8 t/s	Best: 81.9 t/s
TTFT	Best: 10.6 s	58.6 s
Input · $ / 1M tokens	Best: $2	$5×2.5 relative to the lowest price among the compared models
Output · $ / 1M tokens	Best: $6	$30×5 relative to the lowest price among the compared models
Context window	500K	Best: 922K
Reasoning	Yes	Yes
Open weights	No	No
Cost / task	Best: $0.881	$2.63×3 relative to the lowest price among the compared models

Intelligence

Grok 4.5 (High): Best: 38.8
GPT-5.5 (Xhigh): 38.4

Coding

Grok 4.5 (High): 72.4
GPT-5.5 (Xhigh): Best: 74.9

Agentic

Grok 4.5 (High): Best: 41.2
GPT-5.5 (Xhigh): 36.4

Speed

Grok 4.5 (High): 56.8 t/s
GPT-5.5 (Xhigh): Best: 81.9 t/s

TTFT

Grok 4.5 (High): Best: 10.6 s
GPT-5.5 (Xhigh): 58.6 s

Input · $ / 1M tokens

Grok 4.5 (High): Best: $2
GPT-5.5 (Xhigh): $5×2.5 relative to the lowest price among the compared models

Output · $ / 1M tokens

Grok 4.5 (High): Best: $6
GPT-5.5 (Xhigh): $30×5 relative to the lowest price among the compared models

Context window

Grok 4.5 (High): 500K
GPT-5.5 (Xhigh): Best: 922K

Reasoning

Grok 4.5 (High): Yes
GPT-5.5 (Xhigh): Yes

Open weights

Grok 4.5 (High): No
GPT-5.5 (Xhigh): No

Cost / task

Grok 4.5 (High): Best: $0.881
GPT-5.5 (Xhigh): $2.63×3 relative to the lowest price among the compared models

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.

Grok 4.5 (High)38.8 · $0.881
GPT-5.5 (Xhigh)38.4 · $2.63