Claude Opus 5 (Medium) vs GPT-5.5 (Medium)
Which is better for the money: Claude Opus 5 (Medium) by Anthropic or GPT-5.5 (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Claude Opus 5 (Medium) scores 11.0 points higher (44.8 vs 33.8) but costs 1.3× as much to run the benchmark ($2732 vs $2095; both flagship class). Pick Claude Opus 5 (Medium) when the extra intelligence is worth the premium, otherwise GPT-5.5 (Medium).
| Metric | Claude Opus 5 (Medium) | GPT-5.5 (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.8 | 33.8 | −24.6% GPT-5.5 (Medium) is 24.6% less intelligent |
| Total AA cost (lower is better) | $2,731.91 | $2,095.12 | −23.3% GPT-5.5 (Medium) is 23.3% cheaper |
| End-to-end time (lower is better) | 12.73s | 11.17s | −12.3% GPT-5.5 (Medium) is 12.3% faster |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $5.00 / $30.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-5.5 (Medium) vs Claude Opus 5 (Medium): 24.6% less intelligence, 23.3% less cost to run the AA benchmark, and 12.3% faster end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (Medium) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- GPT-5.5 (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
Claude Opus 5 (Medium)GPT-5.5 (Medium)Today's Pareto frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-medium/gpt-5-5-medium · Markdown: /api/v1/compare/claude-opus-5-medium/gpt-5-5-medium?format=md · llms.txt · agent skill