Claude Sonnet 5.5 (High, Default Fallback) vs GPT-6 Astra (High)
Which is better for the money: Claude Sonnet 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.
Trade-off
Verdict
Depends on your budget
GPT-6 Astra (High) scores 4.1 points higher (50.9 vs 46.8) but costs 2.8× as much to run the benchmark ($2925 vs $1027; flagship vs premium cost classes). Pick GPT-6 Astra (High) when the extra intelligence is worth the premium, otherwise Claude Sonnet 5.5 (High, Default Fallba….
| Metric | Claude Sonnet 5.5 (High, Default Fallback) | GPT-6 Astra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 46.8 | 50.9 | +8.8% GPT-6 Astra (High) is 8.8% more intelligent |
| Total AA cost (lower is better) | $1,027.40 | $2,925.01 | +184.7% GPT-6 Astra (High) is 2.8× more expensive |
| End-to-end time (lower is better) | 16.86s | 70.71s | +319.4% GPT-6 Astra (High) is 319.4% slower |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
GPT-6 Astra (High) vs Claude Sonnet 5.5 (High, Default Fallback): 8.8% more intelligence, 184.7% more cost to run the AA benchmark, and 319.4% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Sonnet 5.5 (High, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- 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 Sonnet 5.5 (High, Default Fallback)GPT-6 Astra (High)Today's Pareto frontierEvery other model
Matchup
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