Model Comparator

Compare up to four models using the same criteria.

Claude Sonnet 5 (High)
Anthropic
GPT-5.3 Codex (Xhigh)
OpenAI

Differences only

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

Model Comparator
Metrics	Claude Sonnet 5 (High) Anthropic	GPT-5.3 Codex (Xhigh) OpenAI
Intelligence	31.7	Best: 32.5
Speed	59 t/s	Best: 98.5 t/s
TTFT	Best: 14.3 s	71.5 s
Input · $ / 1M tokens	$2×1.1 relative to the lowest price among the compared models	Best: $1.75
Output · $ / 1M tokens	Best: $10	$14×1.4 relative to the lowest price among the compared models
Context window	Best: 1M	400K
Reasoning	Yes	Yes
Open weights	No	No
Cost / task	$1.79	—

Intelligence

Claude Sonnet 5 (High): 31.7
GPT-5.3 Codex (Xhigh): Best: 32.5

Speed

Claude Sonnet 5 (High): 59 t/s
GPT-5.3 Codex (Xhigh): Best: 98.5 t/s

TTFT

Claude Sonnet 5 (High): Best: 14.3 s
GPT-5.3 Codex (Xhigh): 71.5 s

Input · $ / 1M tokens

Claude Sonnet 5 (High): $2×1.1 relative to the lowest price among the compared models
GPT-5.3 Codex (Xhigh): Best: $1.75

Output · $ / 1M tokens

Claude Sonnet 5 (High): Best: $10
GPT-5.3 Codex (Xhigh): $14×1.4 relative to the lowest price among the compared models

Context window

Claude Sonnet 5 (High): Best: 1M
GPT-5.3 Codex (Xhigh): 400K

Reasoning

Claude Sonnet 5 (High): Yes
GPT-5.3 Codex (Xhigh): Yes

Open weights

Claude Sonnet 5 (High): No
GPT-5.3 Codex (Xhigh): No

Cost / task

Claude Sonnet 5 (High): $1.79
GPT-5.3 Codex (Xhigh): —

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.

Claude Sonnet 5 (High)31.7 · $4
GPT-5.3 Codex (Xhigh)32.5 · $4.81