Celeris-1 vs GPT-5.5 (medium)
Which is better for the money: Celeris-1 by Celeris or GPT-5.5 (medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-09-09.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (medium) scores 27.9 points higher (34.2 vs 6.3) but costs 35× as much to run the benchmark ($2095 vs $60.0; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.5 (medium) when you need intelligence above 6.3, and Celeris-1 when 6.3 is enough.
| Metric | Celeris-1 | GPT-5.5 (medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 6.3 | 34.2 | +442.9% GPT-5.5 (medium) is 5.4× more intelligent |
| Total AA cost (lower is better) | $59.99 | $2,095.12 | +3392.4% GPT-5.5 (medium) is 35× more expensive |
| End-to-end time (lower is better) | 0.97s | 11.45s | +1080.4% GPT-5.5 (medium) is 1080.4% slower |
| Price per 1M tokens (in / out) | $0.20 / $0.70 | $5.00 / $30.0 | |
| Input modalities | Not reported | Not reported |
GPT-5.5 (medium) vs Celeris-1: 442.9% more intelligence, 3392.4% more cost to run the AA benchmark, and 1080.4% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Celeris-1 is off the frontier: at the same or lower cost, MiMo-V2.5 scores 22.30 for $42.6.
- GPT-5.5 (medium) is off the frontier: at the same or lower cost, Muse Spark 1.3 (max) scores 48.20 for $2000.
Celeris-1GPT-5.5 (medium)Today's Pareto frontierEvery other model
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/celeris-1/gpt-5-5-medium · Markdown: /api/v1/compare/celeris-1/gpt-5-5-medium?format=md · llms.txt · agent skill