# Exaone 4.0 1.2B vs GPT-5.4 mini

> Side-by-side benchmark comparison for Exaone 4.0 1.2B and GPT-5.4 mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/exaone-4-0-1-2b-vs-gpt-5-4-mini
- Last updated: September 29, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Exaone 4.0 1.2B and GPT-5.4 mini.

## Summary

- Exaone 4.0 1.2B and GPT-5.4 mini 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 | Exaone 4.0 1.2B | GPT-5.4 mini |
|----------|----------|----------|
| Creator | LG AI Research | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 400K |
| Independent public score (not head-to-head) | 30.58 | 54.85 |
| Benchmarks Covered | 0 | 21 |
| Pricing (input/output) | N/A | $0.75 / $4.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 34 (Supported · #71/117)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 60% | Coming soon |
| OSWorld-Verified | Coming soon | 72.1% | Coming soon |
| MCP Atlas | Coming soon | 57.7% | Coming soon |
| Toolathlon | Coming soon | 42.9% | Coming soon |
| τ²-bench results | Coming soon | 93.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 54.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 36.9 (Supported · #72/143)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | Coming soon | 47.97% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 27.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 81.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 73.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: 22.1 (Unranked · 2 rankable rows)
- GPT-5.4 mini public-lane score: 40 (Unranked · 4 rankable rows)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | Coming soon | 63.70% | Coming soon |
| ARC-AGI-2 | Coming soon | 18.9% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 58.3 (#33/50)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 76.6% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 78% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: 26.6 (Estimated · #156/169)
- GPT-5.4 mini public-lane score: 48.2 (Supported · #67/169)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 88% | Coming soon |
| HLE | Coming soon | 41.5% | Coming soon |
| HLE w/o tools | Coming soon | 28.2% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 83.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 84.6% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: 27.4 (Unranked · 1 rankable row)
- GPT-5.4 mini public-lane score: 88.5 (#24/124)

### Mathematics

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 44.3 (Unranked · 2 rankable rows)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 28.280% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 2.080% | Coming soon |

## FAQ

### Can I compare Exaone 4.0 1.2B and GPT-5.4 mini 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

- [Exaone 4.0 1.2B vs Exaone 4.0 32B](/compare/exaone-4-0-1-2b-vs-exaone-4-0-32b)
- [GPT-5.4 mini vs Exaone 4.0 32B](/compare/exaone-4-0-32b-vs-gpt-5-4-mini)
- [Exaone 4.0 1.2B vs GPT-5.4 Pro](/compare/exaone-4-0-1-2b-vs-gpt-5-4-pro)
- [GPT-5.4 mini vs GPT-5.4 Pro](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)

## Explore More

- [Exaone 4.0 1.2B profile](/models/exaone-4-0-1-2b)
- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)