# GPT-5.4 mini vs Laguna S 2.1

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

- Canonical page: https://benchlm.ai/compare/gpt-5-4-mini-vs-laguna-s-2-1
- Last updated: September 4, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.4 mini and Laguna S 2.1 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.
- Laguna S 2.1 has the lower published output-token price.
- Laguna S 2.1 has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.4 mini | Laguna S 2.1 |
|----------|----------|----------|
| Creator | OpenAI | Poolside |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 62.63 | null |
| Benchmarks Covered | 19 | 6 |
| Pricing (input/output) | $0.75 / $4.50 | $0.10 / $0.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 42.4 (Estimated · #113/151)
- Laguna S 2.1 public-lane score: 48.2 (Estimated · #77/151)

| Benchmark | GPT-5.4 mini | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60% | 70.2% | Laguna S 2.1 |
| OSWorld-Verified | 72.1% | Coming soon | Coming soon |
| MCP Atlas | 57.7% | Coming soon | Coming soon |
| Toolathlon | 42.9% | Coming soon | Coming soon |
| τ²-bench results | 93.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 54.7% | Coming soon | Coming soon |
| Toolathlon-Verified | Coming soon | 49.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 42.9 (Supported · #125/183)
- Laguna S 2.1 public-lane score: 47.8 (Estimated · #87/183)

| Benchmark | GPT-5.4 mini | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 47.97% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 27.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 73.0% | Coming soon | Coming soon |
| 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 mini public-lane score: 56.6 (#32/48)
- Laguna S 2.1 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.6% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 78% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 73.5 (Unranked · 2 rankable rows)
- Laguna S 2.1 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 56.4 (Supported · #53/181)
- Laguna S 2.1 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 88% | Coming soon | Coming soon |
| HLE | 41.5% | Coming soon | Coming soon |
| HLE w/o tools | 28.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 83.1% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 84.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 89.6 (#23/120)
- Laguna S 2.1 public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 44.5 (Unranked · 2 rankable rows)
- Laguna S 2.1 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 28.280% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.080% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.4 mini and Laguna S 2.1?

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

## Explore More

- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [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)