# Exaone 4.0 1.2B vs GPT-5.4 nano

> Side-by-side benchmark comparison for Exaone 4.0 1.2B and GPT-5.4 nano 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-nano
- Last updated: September 21, 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 Exaone 4.0 1.2B and GPT-5.4 nano.

## Summary

- Exaone 4.0 1.2B and GPT-5.4 nano 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 nano |
|----------|----------|----------|
| Creator | LG AI Research | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 400K |
| Independent public score (not head-to-head) | 38.37 | 59.52 |
| Benchmarks Covered | 0 | 18 |
| Pricing (input/output) | N/A | $0.20 / $1.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 35.5 (Supported · #137/154)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 46.3% | Coming soon |
| OSWorld-Verified | Coming soon | 39% | Coming soon |
| MCP Atlas | Coming soon | 56.1% | Coming soon |
| Toolathlon | Coming soon | 35.5% | Coming soon |
| τ²-bench results | Coming soon | 92.5% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 41.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 38.1 (Supported · #130/156)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | Coming soon | 26.10% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 84.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 69.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: 21 (Unranked · 2 rankable rows)
- GPT-5.4 nano public-lane score: 73.7 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 23.8 (#46/49)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 66.1% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 69.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: 36.2 (Estimated · #157/186)
- GPT-5.4 nano public-lane score: 48 (Supported · #96/186)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 82.8% | Coming soon |
| HLE | Coming soon | 37.7% | Coming soon |
| HLE w/o tools | Coming soon | 24.3% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 77.5% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 77.2% | 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 nano public-lane score: 91.9 (#9/124)

### Mathematics

- Winner: Insufficient shared evidence
- Exaone 4.0 1.2B public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 43.8 (Unranked · 2 rankable rows)

| Benchmark | Exaone 4.0 1.2B | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 25.860% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 6.250% | Coming soon |

## FAQ

### Can I compare Exaone 4.0 1.2B and GPT-5.4 nano 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 nano vs Exaone 4.0 32B](/compare/exaone-4-0-32b-vs-gpt-5-4-nano)
- [Exaone 4.0 1.2B vs GPT-5.4](/compare/exaone-4-0-1-2b-vs-gpt-5-4)
- [GPT-5.4 nano vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-nano)

## Explore More

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