GPT-6 Astra (High) vs Grok 4.5 (High)
Which is better for the money: GPT-6 Astra (High) by OpenAI or Grok 4.5 (High) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
GPT-6 Astra (High) scores 12.1 points higher (50.9 vs 38.8) but costs 2.4× as much to run the benchmark ($2925 vs $1244; flagship vs premium cost classes). Pick GPT-6 Astra (High) when the extra intelligence is worth the premium, otherwise Grok 4.5 (High).
| Metric | GPT-6 Astra (High) | Grok 4.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 50.9 | 38.8 | −23.8% Grok 4.5 (High) is 23.8% less intelligent |
| Total AA cost (lower is better) | $2,925.01 | $1,243.85 | −57.5% Grok 4.5 (High) is 57.5% cheaper |
| End-to-end time (lower is better) | 45.44s | 18.82s | −58.6% Grok 4.5 (High) is 58.6% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.5 (High) vs GPT-6 Astra (High): 23.8% less intelligence, 57.5% less cost to run the AA benchmark, and 58.6% faster end-to-end.
Today's Pareto frontier
Against the frontier
- 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.
- Grok 4.5 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-6 Astra (High)Grok 4.5 (High)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/gpt-6-astra-high/grok-4-5 · Markdown: /api/v1/compare/gpt-6-astra-high/grok-4-5?format=md · llms.txt · agent skill