# GPT-5.5 Pro vs Llama 4 Scout

> Side-by-side benchmark comparison for GPT-5.5 Pro and Llama 4 Scout across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-5-pro-vs-llama-4-scout
- Last updated: September 29, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.5 Pro and Llama 4 Scout 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.
- Llama 4 Scout has the lower published output-token price.
- Llama 4 Scout has the larger published context window at 10M.

## Model Snapshot

| Property | GPT-5.5 Pro | Llama 4 Scout |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M | 10M |
| Independent public score (not head-to-head) | 72.18 | 29.39 |
| Benchmarks Covered | 8 | 1 |
| Pricing (input/output) | $30.00 / $180.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.5 Pro public-lane score: Coming soon
- Llama 4 Scout public-lane score: 9.9 (Estimated · #115/117)

| Benchmark | GPT-5.5 Pro | Llama 4 Scout | Winner |
|-----------|-----------|-----------|--------|
| BrowseComp | 90.1% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.5 Pro public-lane score: Coming soon
- Llama 4 Scout public-lane score: 13.9 (Estimated · #139/143)

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.5 Pro public-lane score: 75.1 (Unranked · 3 rankable rows)
- Llama 4 Scout public-lane score: 41.2 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.5 Pro | Llama 4 Scout | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 95.00% | Coming soon | Coming soon |
| ARC-AGI-2 | 84.2% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.5 Pro public-lane score: Coming soon
- Llama 4 Scout public-lane score: 39.1 (Unranked · 1 rankable row)

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.5 Pro public-lane score: Coming soon
- Llama 4 Scout public-lane score: 26.5 (Estimated · #157/169)

| Benchmark | GPT-5.5 Pro | Llama 4 Scout | Winner |
|-----------|-----------|-----------|--------|
| HLE | 57.2% | Coming soon | Coming soon |
| HLE w/o tools | 43.1% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.5 Pro public-lane score: Coming soon
- Llama 4 Scout public-lane score: 44.3 (#91/124)

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.5 Pro public-lane score: 70.1 (Unranked · 3 rankable rows)
- Llama 4 Scout public-lane score: 25.1 (Unranked · 1 rankable row)

| Benchmark | GPT-5.5 Pro | Llama 4 Scout | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 52.4% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 51.000% | 0.000% | GPT-5.5 Pro |
| FrontierMath v2 (Tier 4) | 39.600% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.5 Pro and Llama 4 Scout?

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

- [GPT-5.5 Pro vs GPT-5.5](/compare/gpt-5-5-vs-gpt-5-5-pro)
- [Llama 4 Scout vs GPT-5.5](/compare/gpt-5-5-vs-llama-4-scout)
- [GPT-5.5 Pro vs GPT-6 Astra](/compare/gpt-5-5-pro-vs-gpt-6-astra)
- [Llama 4 Scout vs GPT-6 Astra](/compare/gpt-6-astra-vs-llama-4-scout)

## Explore More

- [GPT-5.5 Pro profile](/models/gpt-5-5-pro)
- [Llama 4 Scout profile](/models/llama-4-scout)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)