# GPT-5.4 mini vs Laguna XS.2

> Side-by-side benchmark comparison for GPT-5.4 mini and Laguna XS.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-mini-vs-laguna-xs-2
- Last updated: September 10, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GPT-5.4 mini if you want the stronger benchmark profile. Laguna XS.2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.4 mini leads overall 61.11 to 1.53.
- The clearest category separation is in knowledge, where the averages are 55.6 for GPT-5.4 mini and 17.7 for Laguna XS.2.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 54.7% and 25.8%.
- Laguna XS.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.4 mini also has the larger context window at 400K.

## Model Snapshot

| Property | GPT-5.4 mini | Laguna XS.2 |
|----------|----------|----------|
| Creator | OpenAI | Poolside |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 256K |
| Overall Score | 61.11 | 1.53 |
| Benchmarks Covered | 19 | 10 |
| Pricing (input/output) | $0.75 / $4.50 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 39.1 (Estimated · #119/152)
- Laguna XS.2 public-lane score: 22.4 (Estimated · #149/152)

| Benchmark | GPT-5.4 mini | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60% | 35.7% | GPT-5.4 mini |
| 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% | 25.8% | GPT-5.4 mini |

### Coding

- Winner: GPT-5.4 mini
- GPT-5.4 mini public-lane score: 42.7 (Supported · #104/151)
- Laguna XS.2 public-lane score: 24.7 (Supported · #148/151)

| Benchmark | GPT-5.4 mini | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 47.97% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 27.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.5% | 67.8% | GPT-5.4 mini |
| SWE-bench (Vals) | 73.0% | 55.2% | GPT-5.4 mini |
| SWE-bench Verified | Coming soon | 69.9% | Coming soon |
| SWE Multilingual | Coming soon | 57.7% | Coming soon |
| SWE-bench Pro | Coming soon | 46.3% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 35.7% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 57.2 (#31/48)
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.6% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 78% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 73.9 (Unranked · 2 rankable rows)
- Laguna XS.2 public-lane score: Coming soon

### Knowledge

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 55.6 (Supported · #52/183)
- Laguna XS.2 public-lane score: 17.7 (Estimated · #183/183)

| Benchmark | GPT-5.4 mini | Laguna XS.2 | 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% | 55.1% | GPT-5.4 mini |
| MMLU-Pro (Vals) | 84.6% | 69.1% | GPT-5.4 mini |

### Instruction Following

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 89.8 (#23/123)
- Laguna XS.2 public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 44.5 (Unranked · 2 rankable rows)
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 28.280% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.080% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.4 mini or Laguna XS.2?

GPT-5.4 mini is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.4 mini and Laguna XS.2?

The widest category gap is in knowledge, where the averages are 55.6 for GPT-5.4 mini and 17.7 for Laguna XS.2.

### How many benchmarks does GPT-5.4 mini cover on BenchLM?

GPT-5.4 mini currently has 19 sourced benchmark scores on BenchLM.

### How many benchmarks does Laguna XS.2 cover on BenchLM?

Laguna XS.2 currently has 10 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.4 mini vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [Laguna XS.2 vs GPT-5.4](/compare/gpt-5-4-vs-laguna-xs-2)
- [GPT-5.4 mini vs GPT-5.4 Pro](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)
- [Laguna XS.2 vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-laguna-xs-2)

## Explore More

- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [Laguna XS.2 profile](/models/laguna-xs-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)