Claude Opus 5.5 (Medium, Default Fallback) vs GPT-6 Astra (High)
Which is better for the money: Claude Opus 5.5 (Medium, Default Fallback) by Anthropic or GPT-6 Astra (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick Claude Opus 5.5 (Medium, Default Fallback)
GPT-6 Astra (High) vs Claude Opus 5.5 (Medium, Default Fallback): 0.6% less intelligence, 79.8% more cost to run the AA benchmark, and 127.6% slower end-to-end.
| Metric | Claude Opus 5.5 (Medium, Default Fallback) | GPT-6 Astra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.2 | 50.9 | −0.6% GPT-6 Astra (High) is 0.6% less intelligent |
| Total AA cost (lower is better) | $1,626.81 | $2,925.01 | +79.8% GPT-6 Astra (High) is 79.8% more expensive |
| End-to-end time (lower is better) | 21.78s | 49.57s | +127.6% GPT-6 Astra (High) is 127.6% slower |
| Price per 1M tokens (in / out) | $4.00 / $20.0 | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- Claude Opus 5.5 (Medium, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- GPT-6 Astra (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
Claude Opus 5.5 (Medium, Default Fallback)GPT-6 Astra (High)Today's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-5-medium/gpt-6-astra-high · Markdown: /api/v1/compare/claude-opus-5-5-medium/gpt-6-astra-high?format=md · llms.txt · agent skill