# GPT-OSS 120B vs Particle-1

> Side-by-side benchmark comparison for GPT-OSS 120B and Particle-1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-oss-120b-vs-particle-1
- Last updated: October 29, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-OSS 120B and Particle-1 share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-OSS 120B has the lower published output-token price.
- Particle-1 has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-OSS 120B | Particle-1 |
|----------|----------|----------|
| Creator | OpenAI | Particle AI |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 1M |
| Independent public score (not head-to-head) | 40.74 | null |
| Benchmarks Covered | 8 | 5 |
| Pricing (input/output) | $0.00 / $0.00 | $0.25 / $1.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 27.5 (Estimated · #114/135)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-OSS 120B | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 29.61% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 79.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 28.4 (Estimated · #108/156)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-OSS 120B | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 62.4% | Coming soon | Coming soon |
| React Native Evals | 71.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 79.9% | Coming soon |
| DeepSWE | Coming soon | 72.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 60.7 (Unranked · 2 rankable rows)
- Particle-1 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 39.6 (Supported · #116/179)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-OSS 120B | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 90% | 86.1% | GPT-OSS 120B |
| GPQA | 80.1% | Coming soon | Coming soon |
| HLE | 14.9% | Coming soon | Coming soon |
| GPQA-D | Coming soon | 90.4% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: 84.3 (#53/157)
- Particle-1 public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- GPT-OSS 120B public-lane score: Coming soon
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-OSS 120B | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2024 | 95.8% | Coming soon | Coming soon |
| AIME 2025 | 92.5% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-OSS 120B and Particle-1?

Not yet. The models share only 1 sourced benchmark row, 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-OSS 120B vs GPT-OSS 20B](/compare/gpt-oss-120b-vs-gpt-oss-20b)
- [Particle-1 vs GPT-OSS 20B](/compare/gpt-oss-20b-vs-particle-1)
- [GPT-OSS 120B vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-gpt-oss-120b)
- [Particle-1 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-particle-1)

## Explore More

- [GPT-OSS 120B profile](/models/gpt-oss-120b)
- [Particle-1 profile](/models/particle-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)