Claude Sonnet 5.5 (Xhigh, Default Fallback) vs GPT-6 Astra (Medium)
Which is better for the money: Claude Sonnet 5.5 (Xhigh, Default Fallback) by Anthropic or GPT-6 Astra (Medium) 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 Sonnet 5.5 (Xhigh, Default Fallback)
GPT-6 Astra (Medium) vs Claude Sonnet 5.5 (Xhigh, Default Fallback): 4.4% less intelligence, 11.8% more cost to run the AA benchmark, and 57.4% faster end-to-end.
| Metric | Claude Sonnet 5.5 (Xhigh, Default Fallback) | GPT-6 Astra (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.9 | 49.6 | −4.4% GPT-6 Astra (Medium) is 4.4% less intelligent |
| Total AA cost (lower is better) | $2,176.82 | $2,434.12 | +11.8% GPT-6 Astra (Medium) is 11.8% more expensive |
| End-to-end time (lower is better) | 34.96s | 14.89s | −57.4% GPT-6 Astra (Medium) is 57.4% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5.5 (Xhigh, Default Fallback) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- GPT-6 Astra (Medium) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
Claude Sonnet 5.5 (Xhigh, Default Fallback)GPT-6 Astra (Medium)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-sonnet-5-5-xhigh/gpt-6-astra-medium · Markdown: /api/v1/compare/claude-sonnet-5-5-xhigh/gpt-6-astra-medium?format=md · llms.txt · agent skill