Model Comparator

Compare up to four models using the same criteria.

Step 3.5 Flash 2603
StepFun
GPT-5 mini (High)
OpenAI

Differences only

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

Model Comparator
Metrics	Step 3.5 Flash 2603 StepFun	GPT-5 mini (High) OpenAI
Intelligence	Best: 17	16.8
Coding	—	15.6
Math	—	90.7
Agentic	—	6.8
Speed	142 t/s	Best: 148 t/s
TTFT	Best: 3.33 s	49.5 s
Input · $ / 1M tokens	Best: $0.10	$0.25×2.5 relative to the lowest price among the compared models
Output · $ / 1M tokens	Best: $0.30	$2×6.7 relative to the lowest price among the compared models
Context window	256K	Best: 400K
Reasoning	Yes	Yes
Open weights	No	No
Cost / task	—	$0.0535

Intelligence

Step 3.5 Flash 2603: Best: 17
GPT-5 mini (High): 16.8

Coding

Step 3.5 Flash 2603: —
GPT-5 mini (High): 15.6

Math

Step 3.5 Flash 2603: —
GPT-5 mini (High): 90.7

Agentic

Step 3.5 Flash 2603: —
GPT-5 mini (High): 6.8

Speed

Step 3.5 Flash 2603: 142 t/s
GPT-5 mini (High): Best: 148 t/s

TTFT

Step 3.5 Flash 2603: Best: 3.33 s
GPT-5 mini (High): 49.5 s

Input · $ / 1M tokens

Step 3.5 Flash 2603: Best: $0.10
GPT-5 mini (High): $0.25×2.5 relative to the lowest price among the compared models

Output · $ / 1M tokens

Step 3.5 Flash 2603: Best: $0.30
GPT-5 mini (High): $2×6.7 relative to the lowest price among the compared models

Context window

Step 3.5 Flash 2603: 256K
GPT-5 mini (High): Best: 400K

Reasoning

Step 3.5 Flash 2603: Yes
GPT-5 mini (High): Yes

Open weights

Step 3.5 Flash 2603: No
GPT-5 mini (High): No

Cost / task

Step 3.5 Flash 2603: —
GPT-5 mini (High): $0.0535

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.

Step 3.5 Flash 260317 · $0.15
GPT-5 mini (High)16.8 · $0.688