Claude Opus 5.5 (Medium, Default Fallback) vs GPT-5.5 Instant (May 2026)
Claude Opus 5.5 (Medium, Default Fallback) vs GPT-5.5 Instant (May 2026). 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 5.5 (Medium, Default Fallback) | GPT-5.5 Instant (May 2026) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.2 | 22.7 | −55.7% GPT-5.5 Instant (May … is 55.7% less intelligent |
| Total AA cost (lower is better) | $1,626.81 | Not reported | — not comparable |
| End-to-end time (lower is better) | 25.34s | Not reported | — not comparable |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $5.00 / $30.0 | |
| Input modalities | Text, Image | Text, Image |
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-5-medium/gpt-5-5-instant-05-26 · Markdown: /api/v1/compare/claude-opus-5-5-medium/gpt-5-5-instant-05-26?format=md · llms.txt · agent skill