Claude Sonnet 5.5 (Xhigh, Default Fallback) vs Grok 4.3 (Non-reasoning)
Which is better for the money: Claude Sonnet 5.5 (Xhigh, Default Fallback) by Anthropic or Grok 4.3 (Non-reasoning) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Depends on your budget
Claude Sonnet 5.5 (Xhigh, Default Fallb… scores 37.9 points higher (51.9 vs 14.0) but costs 8.7× as much to run the benchmark ($2177 vs $250; flagship vs mid-range cost classes). They are not alternatives at one budget: pick Claude Sonnet 5.5 (Xhigh, Default Fallb… when you need intelligence above 14.0, and Grok 4.3 (Non-reasoning) when 14.0 is enough.
| Metric | Claude Sonnet 5.5 (Xhigh, Default Fallback) | Grok 4.3 (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 51.9 | 14.0 | −73.0% Grok 4.3 (Non-reasoni… is 73.0% less intelligent |
| Total AA cost (lower is better) | $2,176.82 | $250.37 | −88.5% Grok 4.3 (Non-reasoni… is 88.5% cheaper |
| End-to-end time (lower is better) | 33.91s | 5.86s | −82.7% Grok 4.3 (Non-reasoni… is 82.7% faster |
| Price per 1M tokens (in / out) | $2.00 / $10.0 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.3 (Non-reasoning) vs Claude Sonnet 5.5 (Xhigh, Default Fallback): 73.0% less intelligence, 88.5% less cost to run the AA benchmark, and 82.7% faster end-to-end.
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.
- Grok 4.3 (Non-reasoning) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
Compare something else
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-sonnet-5-5-xhigh/grok-4-3-non-reasoning · Markdown: /api/v1/compare/claude-sonnet-5-5-xhigh/grok-4-3-non-reasoning?format=md · llms.txt · agent skill