Claude Opus 5.5 (High, Default Fallback) vs GPT-6 Astra (High)
Which is better for the money: Claude Opus 5.5 (High, 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 (High, Default Fallback)
GPT-6 Astra (High) vs Claude Opus 5.5 (High, Default Fallback): 5.0% less intelligence, 34.6% more cost to run the AA benchmark, and 128.4% slower end-to-end.
| Metric | Claude Opus 5.5 (High, Default Fallback) | GPT-6 Astra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 53.6 | 50.9 | −5.0% GPT-6 Astra (High) is 5.0% less intelligent |
| Total AA cost (lower is better) | $2,172.43 | $2,925.01 | +34.6% GPT-6 Astra (High) is 34.6% more expensive |
| End-to-end time (lower is better) | 41.01s | 93.68s | +128.4% GPT-6 Astra (High) is 128.4% 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 (High, Default Fallback) is on today's frontier: nothing is both smarter and cheaper.
- 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 (High, Default Fallback)GPT-6 Astra (High)Today's Pareto frontierEvery other model
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