# Celeris-1 vs Nemotron Ultra 253B

> Side-by-side benchmark comparison for Celeris-1 and Nemotron Ultra 253B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/celeris-1-vs-nemotron-ultra-253b
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Celeris-1 and Nemotron Ultra 253B.

## Summary

- Celeris-1 and Nemotron Ultra 253B do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Celeris-1 | Nemotron Ultra 253B |
|----------|----------|----------|
| Creator | Celeris | NVIDIA |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 32K |
| Independent public score (not head-to-head) | null | 44.09 |
| Benchmarks Covered | 4 | 0 |
| Pricing (input/output) | $0.20 / $0.70 | $0.00 / $0.00 |

## Category Breakdown

### Reasoning

- Winner: Insufficient shared evidence
- Celeris-1 public-lane score: 47.8 (Unranked · 3 rankable rows)
- Nemotron Ultra 253B public-lane score: Coming soon

| Benchmark | Celeris-1 | Nemotron Ultra 253B | Winner |
|-----------|-----------|-----------|--------|
| DROP | 81.4% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Celeris-1 public-lane score: Coming soon
- Nemotron Ultra 253B public-lane score: Coming soon

| Benchmark | Celeris-1 | Nemotron Ultra 253B | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro | 75.9% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Celeris-1 public-lane score: Coming soon
- Nemotron Ultra 253B public-lane score: Coming soon

| Benchmark | Celeris-1 | Nemotron Ultra 253B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 80.8% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Celeris-1 public-lane score: Coming soon
- Nemotron Ultra 253B public-lane score: Coming soon

| Benchmark | Celeris-1 | Nemotron Ultra 253B | Winner |
|-----------|-----------|-----------|--------|
| GSM8K | 93.7% | Coming soon | Coming soon |

## FAQ

### Can I compare Celeris-1 and Nemotron Ultra 253B on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Celeris-1 vs Claude Fable 5.1](/compare/celeris-1-vs-claude-fable-5-1)
- [Nemotron Ultra 253B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-nemotron-ultra-253b)
- [Celeris-1 vs GPT-6 Astra](/compare/celeris-1-vs-gpt-6-astra)
- [Nemotron Ultra 253B vs GPT-6 Astra](/compare/gpt-6-astra-vs-nemotron-ultra-253b)

## Explore More

- [Celeris-1 profile](/models/celeris-1)
- [Nemotron Ultra 253B profile](/models/nemotron-ultra-253b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)