Claude Opus 4.5 (Reasoning) vs Step 3.5 Flash 2603
Claude Opus 4.5 (Reasoning) vs Step 3.5 Flash 2603. A reliable intelligence-versus-cost verdict requires both models' intelligence scores and benchmark-run costs. Missing data is not a performance verdict.
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.
| Metric | Claude Opus 4.5 (Reasoning) | Step 3.5 Flash 2603 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.1 | 17.0 | −41.6% Step 3.5 Flash 2603 is 41.6% less intelligent |
| Total AA cost (lower is better) | Not reported | Not reported | — not comparable |
| End-to-end time (lower is better) | 26.25s | 20.55s | −21.7% Step 3.5 Flash 2603 is 21.7% faster |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $0.10 / $0.30 | |
| Input modalities | Text, Image | Text |
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-4-5-thinking/step-3-5-flash · Markdown: /api/v1/compare/claude-opus-4-5-thinking/step-3-5-flash?format=md · llms.txt · agent skill