# GPT-5 mini vs Granite 4.2 3B

> Side-by-side benchmark comparison for GPT-5 mini and Granite 4.2 3B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-mini-vs-granite-4-2-3b
- Last updated: September 10, 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 GPT-5 mini and Granite 4.2 3B.

## Summary

- GPT-5 mini and Granite 4.2 3B 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 | GPT-5 mini | Granite 4.2 3B |
|----------|----------|----------|
| Creator | OpenAI | IBM |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 128K |
| Independent public score (not head-to-head) | 45.06 | null |
| Benchmarks Covered | 1 | 9 |
| Pricing (input/output) | $0.25 / $2.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5 mini public-lane score: 39 (Estimated · #120/152)
- Granite 4.2 3B public-lane score: Coming soon

| Benchmark | GPT-5 mini | Granite 4.2 3B | Winner |
|-----------|-----------|-----------|--------|
| τ³-bench results | Coming soon | 45.8% | Coming soon |
| BFCL v4 | Coming soon | 52.4% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5 mini public-lane score: 40.2 (Estimated · #115/151)
- Granite 4.2 3B public-lane score: Coming soon

| Benchmark | GPT-5 mini | Granite 4.2 3B | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 14.17% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 69.7% | Coming soon |
| SciCode | Coming soon | 24.1% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5 mini public-lane score: Coming soon
- Granite 4.2 3B public-lane score: 37.7 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5 mini public-lane score: Coming soon
- Granite 4.2 3B public-lane score: Coming soon

| Benchmark | GPT-5 mini | Granite 4.2 3B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 54.8% | Coming soon |
| MMLU-Pro | Coming soon | 67.8% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5 mini public-lane score: Coming soon
- Granite 4.2 3B public-lane score: Coming soon

| Benchmark | GPT-5 mini | Granite 4.2 3B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 74.3% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5 mini public-lane score: Coming soon
- Granite 4.2 3B public-lane score: Coming soon

| Benchmark | GPT-5 mini | Granite 4.2 3B | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 78.3% | Coming soon |
| HMMT Feb 2025 | Coming soon | 66.7% | Coming soon |

## FAQ

### Can I compare GPT-5 mini and Granite 4.2 3B 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

- [GPT-5 mini vs GPT-5 (high)](/compare/gpt-5-high-vs-gpt-5-mini)
- [Granite 4.2 3B vs GPT-5 (high)](/compare/gpt-5-high-vs-granite-4-2-3b)
- [GPT-5 mini vs GPT-5 (medium)](/compare/gpt-5-medium-vs-gpt-5-mini)
- [Granite 4.2 3B vs GPT-5 (medium)](/compare/gpt-5-medium-vs-granite-4-2-3b)

## Explore More

- [GPT-5 mini profile](/models/gpt-5-mini)
- [Granite 4.2 3B profile](/models/granite-4-2-3b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)