Celeris-1 vs Claude Opus 5.5 (Low, Default Fallback)
Which is better for the money: Celeris-1 by Celeris or Claude Opus 5.5 (Low, Default Fallback) by Anthropic? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Claude Opus 5.5 (Low, Default Fallback) scores 36.0 points higher (42.3 vs 6.3) but costs 14× as much to run the benchmark ($860 vs $60.0; premium vs mid-range cost classes). They are not alternatives at one budget: pick Claude Opus 5.5 (Low, Default Fallback) when you need intelligence above 6.3, and Celeris-1 when 6.3 is enough.
| Metric | Celeris-1 | Claude Opus 5.5 (Low, Default Fallback) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 6.3 | 42.3 | +571.4% Claude Opus 5.5 (Low,… is 6.7× more intelligent |
| Total AA cost (lower is better) | $59.99 | $860.33 | +1334.1% Claude Opus 5.5 (Low,… is 14× more expensive |
| End-to-end time (lower is better) | 0.87s | 11.47s | +1218.4% Claude Opus 5.5 (Low,… is 1218.4% slower |
| Price per 1M tokens (in / out) | $0.20 / $0.70 | $4.00 / $20.0 | |
| Input modalities | Text, Image | Text, Image |
Claude Opus 5.5 (Low, Default Fallback) vs Celeris-1: 571.4% more intelligence, 1334.1% more cost to run the AA benchmark, and 1218.4% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Celeris-1 is off the frontier: at the same or lower cost, Claude Haiku 5.5 (Medium) scores 34.50 for $56.4.
- Claude Opus 5.5 (Low, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Celeris-1Claude Opus 5.5 (Low, Default Fallback)Today's Pareto frontierEvery other model
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