Model Comparator

Compare up to four models using the same criteria.

Gemini 3.5 Flash (High)
Google
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	Gemini 3.5 Flash (High) Google	GPT-5.3 Codex (Xhigh) OpenAI
Intelligence	Best: 32.6	32.5
Coding	70.1	—
Agentic	26	—
Speed	Best: 177 t/s	98.5 t/s
TTFT	Best: 14.7 s	71.5 s
Input · $ / 1M tokens	Best: $1.50	$1.75×1.2 relative to the lowest price among the compared models
Output · $ / 1M tokens	Best: $9	$14×1.6 relative to the lowest price among the compared models
Context window	Best: 1M	400K
Reasoning	Yes	Yes
Open weights	No	No
Cost / task	$3.69	—

Intelligence

Gemini 3.5 Flash (High): Best: 32.6
GPT-5.3 Codex (Xhigh): 32.5

Coding

Gemini 3.5 Flash (High): 70.1
GPT-5.3 Codex (Xhigh): —

Agentic

Gemini 3.5 Flash (High): 26
GPT-5.3 Codex (Xhigh): —

Speed

Gemini 3.5 Flash (High): Best: 177 t/s
GPT-5.3 Codex (Xhigh): 98.5 t/s

TTFT

Gemini 3.5 Flash (High): Best: 14.7 s
GPT-5.3 Codex (Xhigh): 71.5 s

Input · $ / 1M tokens

Gemini 3.5 Flash (High): Best: $1.50
GPT-5.3 Codex (Xhigh): $1.75×1.2 relative to the lowest price among the compared models

Output · $ / 1M tokens

Gemini 3.5 Flash (High): Best: $9
GPT-5.3 Codex (Xhigh): $14×1.6 relative to the lowest price among the compared models

Context window

Gemini 3.5 Flash (High): Best: 1M
GPT-5.3 Codex (Xhigh): 400K

Reasoning

Gemini 3.5 Flash (High): Yes
GPT-5.3 Codex (Xhigh): Yes

Open weights

Gemini 3.5 Flash (High): No
GPT-5.3 Codex (Xhigh): No

Cost / task

Gemini 3.5 Flash (High): $3.69
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.

Gemini 3.5 Flash (High)32.6 · $3.38
GPT-5.3 Codex (Xhigh)32.5 · $4.81