# GPT-OSS 120B vs o1-preview

> Side-by-side benchmark comparison for GPT-OSS 120B and o1-preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-oss-120b-vs-o1-preview
- Last updated: October 17, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for GPT-OSS 120B and o1-preview.

## Summary

- GPT-OSS 120B and o1-preview 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-OSS 120B | o1-preview |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 200K |
| Independent public score (not head-to-head) | 37.32 | 35.98 |
| Benchmarks Covered | 8 | 0 |
| Pricing (input/output) | $0.00 / $0.00 | $15.00 / $60.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 19.5 (Estimated · #110/128)
- o1-preview public-lane score: Coming soon

| Benchmark | GPT-OSS 120B | o1-preview | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 29.61% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 23 (Estimated · #111/150)
- o1-preview public-lane score: 20.1 (Estimated · #121/150)

| Benchmark | GPT-OSS 120B | o1-preview | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 62.4% | Coming soon | Coming soon |
| React Native Evals | 71.6% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 61.6 (Unranked · 2 rankable rows)
- o1-preview public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 38.6 (Supported · #122/184)
- o1-preview public-lane score: Coming soon

| Benchmark | GPT-OSS 120B | o1-preview | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 90% | Coming soon | Coming soon |
| GPQA | 80.1% | Coming soon | Coming soon |
| HLE | 14.9% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 84.3 (#50/148)
- o1-preview public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: Coming soon
- o1-preview public-lane score: Coming soon

| Benchmark | GPT-OSS 120B | o1-preview | Winner |
|-----------|-----------|-----------|--------|
| AIME 2024 | 95.8% | Coming soon | Coming soon |
| AIME 2025 | 92.5% | Coming soon | Coming soon |

## FAQ

### Can I compare GPT-OSS 120B and o1-preview 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-OSS 120B vs GPT-OSS 20B](/compare/gpt-oss-120b-vs-gpt-oss-20b)
- [o1-preview vs GPT-OSS 20B](/compare/gpt-oss-20b-vs-o1-preview)
- [GPT-OSS 120B vs o1](/compare/gpt-oss-120b-vs-o1)
- [o1-preview vs o1](/compare/o1-vs-o1-preview)

## Explore More

- [GPT-OSS 120B profile](/models/gpt-oss-120b)
- [o1-preview profile](/models/o1-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)