# Certo v1 (AltSlate Labs) vs OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16)

> Side-by-side benchmark comparison for Certo v1 (AltSlate Labs) and OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/jevbench-certo-vs-jevbench-openjev-razorback16
- Last updated: September 30, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Certo v1 (AltSlate Labs) and OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.

## Model Snapshot

| Property | Certo v1 (AltSlate Labs) | OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) |
|----------|----------|----------|
| Creator | AltSlate Labs | razorback16 / Codiv |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | null | null |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 2 | 1 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Reasoning

- Winner: Insufficient shared evidence
- Certo v1 (AltSlate Labs) public-lane score: Coming soon
- OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) public-lane score: Coming soon

| Benchmark | Certo v1 (AltSlate Labs) | OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) | Winner |
|-----------|-----------|-----------|--------|
| JevBench 1.4 | 0.00 | 36.85 | OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) |
| JevBench 1.5 | 0.00 | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Certo v1 (AltSlate Labs) and OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16)?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Certo v1 (AltSlate Labs) vs GPT-6 Astra](/compare/gpt-6-astra-vs-jevbench-certo)
- [OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) vs GPT-6 Astra](/compare/gpt-6-astra-vs-jevbench-openjev-razorback16)
- [Certo v1 (AltSlate Labs) vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-jevbench-certo)
- [OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-jevbench-openjev-razorback16)

## Explore More

- [Certo v1 (AltSlate Labs) profile](/models/jevbench-certo)
- [OpenJev (DiffusionGemma 26B-A4B NVFP4, razorback16) profile](/models/jevbench-openjev-razorback16)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)