Model Comparator

Compare up to four models using the same criteria.

GPT-5.1 Codex (High)
OpenAI
Kimi K2.5 (Reasoning)
Moonshot AI

Differences only

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

Model Comparator
Metrics	GPT-5.1 Codex (High) OpenAI	Kimi K2.5 (Reasoning) Moonshot AI
Intelligence	Best: 23.7	23.5
Coding	—	46.8
Math	95.7	—
Speed	Best: 126 t/s	60.1 t/s
TTFT	7.22 s	Best: 1.85 s
Input · $ / 1M tokens	$1.25×2.1 relative to the lowest price among the compared models	Best: $0.60
Output · $ / 1M tokens	$10×3.6 relative to the lowest price among the compared models	Best: $2.75
Context window	Best: 400K	256K
Reasoning	Yes	Yes
Open weights	No	Yes

Intelligence

GPT-5.1 Codex (High): Best: 23.7
Kimi K2.5 (Reasoning): 23.5

Coding

GPT-5.1 Codex (High): —
Kimi K2.5 (Reasoning): 46.8

Math

GPT-5.1 Codex (High): 95.7
Kimi K2.5 (Reasoning): —

Speed

GPT-5.1 Codex (High): Best: 126 t/s
Kimi K2.5 (Reasoning): 60.1 t/s

TTFT

GPT-5.1 Codex (High): 7.22 s
Kimi K2.5 (Reasoning): Best: 1.85 s

Input · $ / 1M tokens

GPT-5.1 Codex (High): $1.25×2.1 relative to the lowest price among the compared models
Kimi K2.5 (Reasoning): Best: $0.60

Output · $ / 1M tokens

GPT-5.1 Codex (High): $10×3.6 relative to the lowest price among the compared models
Kimi K2.5 (Reasoning): Best: $2.75

Context window

GPT-5.1 Codex (High): Best: 400K
Kimi K2.5 (Reasoning): 256K

Reasoning

GPT-5.1 Codex (High): Yes
Kimi K2.5 (Reasoning): Yes

Open weights

GPT-5.1 Codex (High): No
Kimi K2.5 (Reasoning): Yes

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-5.1 Codex (High)23.7 · $3.44
Kimi K2.5 (Reasoning)23.5 · $1.14