Model Comparator

Compare up to four models using the same criteria.

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

Differences only

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

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

Intelligence

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

Coding

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

Math

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

Speed

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

TTFT

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

Input · $ / 1M tokens

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

Output · $ / 1M tokens

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

Context window

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

Reasoning

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

Open weights

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

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.

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