Model Comparator

Compare up to four models using the same criteria.

GPT-5.1 Codex (High)
OpenAI
Claude Opus 4.5 (Non-reasoning)
Anthropic

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	Claude Opus 4.5 (Non-reasoning) Anthropic
Intelligence	23.7	23.7
Math	Best: 95.7	62.7
Speed	Best: 127 t/s	58.6 t/s
TTFT	7.14 s	Best: 1.18 s
Input · $ / 1M tokens	Best: $1.25	$5×4 relative to the lowest price among the compared models
Output · $ / 1M tokens	Best: $10	$25×2.5 relative to the lowest price among the compared models
Context window	Best: 400K	200K
Reasoning	Yes	No
Open weights	No	No

Intelligence

GPT-5.1 Codex (High): 23.7
Claude Opus 4.5 (Non-reasoning): 23.7

Math

GPT-5.1 Codex (High): Best: 95.7
Claude Opus 4.5 (Non-reasoning): 62.7

Speed

GPT-5.1 Codex (High): Best: 127 t/s
Claude Opus 4.5 (Non-reasoning): 58.6 t/s

TTFT

GPT-5.1 Codex (High): 7.14 s
Claude Opus 4.5 (Non-reasoning): Best: 1.18 s

Input · $ / 1M tokens

GPT-5.1 Codex (High): Best: $1.25
Claude Opus 4.5 (Non-reasoning): $5×4 relative to the lowest price among the compared models

Output · $ / 1M tokens

GPT-5.1 Codex (High): Best: $10
Claude Opus 4.5 (Non-reasoning): $25×2.5 relative to the lowest price among the compared models

Context window

GPT-5.1 Codex (High): Best: 400K
Claude Opus 4.5 (Non-reasoning): 200K

Reasoning

GPT-5.1 Codex (High): Yes
Claude Opus 4.5 (Non-reasoning): No

Open weights

GPT-5.1 Codex (High): No
Claude Opus 4.5 (Non-reasoning): 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.

GPT-5.1 Codex (High)23.7 · $3.44
Claude Opus 4.5 (Non-reasoning)23.7 · $10