# GPT-5.4 Pro vs Laguna S 2.1

> Side-by-side benchmark comparison for GPT-5.4 Pro and Laguna S 2.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-pro-vs-laguna-s-2-1
- 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 GPT-5.4 Pro and Laguna S 2.1.

## Summary

- GPT-5.4 Pro and Laguna S 2.1 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 | GPT-5.4 Pro | Laguna S 2.1 |
|----------|----------|----------|
| Creator | OpenAI | Poolside |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | 61.76 | null |
| Benchmarks Covered | 11 | 6 |
| Pricing (input/output) | $30.00 / $180.00 | $0.10 / $0.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 58.5 (Estimated · #32/151)
- Laguna S 2.1 public-lane score: 48.2 (Estimated · #77/151)

| Benchmark | GPT-5.4 Pro | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| BrowseComp | 89.3% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 70.2% | Coming soon |
| Toolathlon-Verified | Coming soon | 49.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: Coming soon
- Laguna S 2.1 public-lane score: 47.8 (Estimated · #87/183)

| Benchmark | GPT-5.4 Pro | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 70.2% | Coming soon |
| SWE Multilingual | Coming soon | 78.5% | Coming soon |
| SWE-bench Pro | Coming soon | 59.4% | Coming soon |
| deepSwe | Coming soon | 40.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 87.9 (Unranked · 1 rankable row)
- Laguna S 2.1 public-lane score: Coming soon

| Benchmark | GPT-5.4 Pro | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 94% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 70.1 (Unranked · 2 rankable rows)
- Laguna S 2.1 public-lane score: Coming soon

| Benchmark | GPT-5.4 Pro | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 83.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 61.2 (Estimated · #36/181)
- Laguna S 2.1 public-lane score: Coming soon

| Benchmark | GPT-5.4 Pro | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 58.7% | Coming soon | Coming soon |
| FrontierScience | 36.7% | Coming soon | Coming soon |
| FrontierScience Research | 36.7% | Coming soon | Coming soon |
| HLE w/o tools | 42.7% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.4 Pro public-lane score: 69 (Unranked · 4 rankable rows)
- Laguna S 2.1 public-lane score: Coming soon

| Benchmark | GPT-5.4 Pro | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| IPhO 2025 (Theory) | 93.5% | Coming soon | Coming soon |
| FrontierMath (legacy) | 50% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 50.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 37.500% | Coming soon | Coming soon |

## FAQ

### Can I compare GPT-5.4 Pro and Laguna S 2.1 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

- [GPT-5.4 Pro vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-pro)
- [Laguna S 2.1 vs GPT-5.4](/compare/gpt-5-4-vs-laguna-s-2-1)
- [GPT-5.4 Pro vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)
- [Laguna S 2.1 vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-laguna-s-2-1)

## Explore More

- [GPT-5.4 Pro profile](/models/gpt-5-4-pro)
- [Laguna S 2.1 profile](/models/laguna-s-2-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)