# jeff (Logan Markewich, GLiFormer 400M) vs Ultravox v0.5 Llama 3.1 8B

> Side-by-side benchmark comparison for jeff (Logan Markewich, GLiFormer 400M) and Ultravox v0.5 Llama 3.1 8B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/jevbench-jeff-vs-ultravox-v0-5-llama-3-1-8b
- Last updated: September 30, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for jeff (Logan Markewich, GLiFormer 400M) and Ultravox v0.5 Llama 3.1 8B.

## Summary

- jeff (Logan Markewich, GLiFormer 400M) and Ultravox v0.5 Llama 3.1 8B 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 | jeff (Logan Markewich, GLiFormer 400M) | Ultravox v0.5 Llama 3.1 8B |
|----------|----------|----------|
| Creator | Logan Markewich | Fixie AI |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | null | N/A |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 2 | 0 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Reasoning

- Winner: Insufficient shared evidence
- jeff (Logan Markewich, GLiFormer 400M) public-lane score: Coming soon
- Ultravox v0.5 Llama 3.1 8B public-lane score: Coming soon

| Benchmark | jeff (Logan Markewich, GLiFormer 400M) | Ultravox v0.5 Llama 3.1 8B | Winner |
|-----------|-----------|-----------|--------|
| JevBench 1.4 | 30.58 | Coming soon | Coming soon |
| JevBench 1.5 | 0.12 | Coming soon | Coming soon |

## FAQ

### Can I compare jeff (Logan Markewich, GLiFormer 400M) and Ultravox v0.5 Llama 3.1 8B 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

- [jeff (Logan Markewich, GLiFormer 400M) vs GPT-6 Astra](/compare/gpt-6-astra-vs-jevbench-jeff)
- [Ultravox v0.5 Llama 3.1 8B vs GPT-6 Astra](/compare/gpt-6-astra-vs-ultravox-v0-5-llama-3-1-8b)
- [jeff (Logan Markewich, GLiFormer 400M) vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-jevbench-jeff)
- [Ultravox v0.5 Llama 3.1 8B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-ultravox-v0-5-llama-3-1-8b)

## Explore More

- [jeff (Logan Markewich, GLiFormer 400M) profile](/models/jevbench-jeff)
- [Ultravox v0.5 Llama 3.1 8B profile](/models/ultravox-v0-5-llama-3-1-8b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)