Claude 4.5 Sonnet (Reasoning) vs o3

Claude 4.5 Sonnet (Reasoning) vs o3. A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

AnthropicClaude 4.5 Sonnet (Reasoning)Off the frontier
Intelligence
20.70
Total cost
$1501
OpenAIo3Not ranked · benchmark data missing
Intelligence
20.20
Total cost
-
Verdict

Comparison incomplete

A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.

MetricClaude 4.5 Sonnet (Reasoning)o3Difference
Intelligence (higher is better)20.720.2−2.4% o3 is 2.4% less intelligent
Total AA cost (lower is better)$1,501.22Not reported— not comparable
End-to-end time (lower is better)20.89s10.44s−50.0% o3 is 50.0% faster
Price per 1M tokens (in / out)$3.00 / $15.0$2.00 / $8.00
Input modalitiesText, ImageText, Image
Open this matchup in the interactive pickerClaude 4.5 Sonnet (Reasoning): what beats ito3: what beats it
Matchup

Compare something else

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-4-5-sonnet-thinking/o3 · Markdown: /api/v1/compare/claude-4-5-sonnet-thinking/o3?format=md · llms.txt · agent skill