# GPT-5.4 mini vs LongCat-Flash-Lite-Sparse

> Side-by-side benchmark comparison for GPT-5.4 mini and LongCat-Flash-Lite-Sparse across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-mini-vs-longcat-flash-lite-sparse
- Last updated: September 10, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.4 mini and LongCat-Flash-Lite-Sparse share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- LongCat-Flash-Lite-Sparse has the lower published output-token price.
- LongCat-Flash-Lite-Sparse has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.4 mini | LongCat-Flash-Lite-Sparse |
|----------|----------|----------|
| Creator | OpenAI | Meituan |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 61.11 | null |
| Benchmarks Covered | 19 | 17 |
| Pricing (input/output) | $0.75 / $4.50 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 39.1 (Estimated · #119/152)
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | LongCat-Flash-Lite-Sparse | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60% | 33.7% | GPT-5.4 mini |
| OSWorld-Verified | 72.1% | Coming soon | Coming soon |
| MCP Atlas | 57.7% | 45.6% | GPT-5.4 mini |
| 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 |
| VITA-Bench | Coming soon | 21.7% | Coming soon |
| BrowseComp | Coming soon | 48.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 42.7 (Supported · #104/151)
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | LongCat-Flash-Lite-Sparse | 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 |
| SWE-bench Verified | Coming soon | 68.2% | Coming soon |
| SWE-bench Pro | Coming soon | 40.6% | Coming soon |
| SWE Multilingual | Coming soon | 59.3% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 33.7% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 57.2 (#31/48)
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | LongCat-Flash-Lite-Sparse | 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: 73.9 (Unranked · 2 rankable rows)
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 55.6 (Supported · #52/183)
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | LongCat-Flash-Lite-Sparse | 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 |
| MMLU | Coming soon | 85.3% | Coming soon |
| MMLU-Pro | Coming soon | 79.2% | Coming soon |
| CMMLU | Coming soon | 84.3% | Coming soon |
| C-Eval | Coming soon | 85.8% | Coming soon |
| GPQA-D | Coming soon | 69.5% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 89.8 (#23/123)
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.4 mini public-lane score: 44.5 (Unranked · 2 rankable rows)
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | LongCat-Flash-Lite-Sparse | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 28.280% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.080% | Coming soon | Coming soon |
| MATH-500 | Coming soon | 95.8% | Coming soon |
| AIME26 | Coming soon | 65.7% | Coming soon |
| HMMT Feb 2026 | Coming soon | 40.5% | Coming soon |
| IMOAnswerBench | Coming soon | 49.4% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.4 mini and LongCat-Flash-Lite-Sparse?

Not yet. The models share only 2 sourced benchmark rows, 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)
- [LongCat-Flash-Lite-Sparse vs GPT-5.4](/compare/gpt-5-4-vs-longcat-flash-lite-sparse)
- [GPT-5.4 mini vs GPT-5.4 Pro](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)
- [LongCat-Flash-Lite-Sparse vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-longcat-flash-lite-sparse)

## Explore More

- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [LongCat-Flash-Lite-Sparse profile](/models/longcat-flash-lite-sparse)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)