# GPT-5.6 Sol vs Particle-1

> Side-by-side benchmark comparison for GPT-5.6 Sol and Particle-1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-6-sol-vs-particle-1
- Last updated: October 29, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick GPT-5.6 Sol if you want the stronger benchmark profile. Particle-1 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.6 Sol leads overall 74.83 to 0.
- The biggest single benchmark swing is Terminal-Bench 2.1 in Agentic, with scores of 91.9% and 79.9%.
- Particle-1 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.6 Sol also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-5.6 Sol | Particle-1 |
|----------|----------|----------|
| Creator | OpenAI | Particle AI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Overall Score | 74.83 | null |
| Benchmarks Covered | 44 | 5 |
| Pricing (input/output) | $4.00 / $20.00 | $0.25 / $1.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 68.8 (Supported · #13/135)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | 79.9% | GPT-5.6 Sol |
| BrowseComp | 92.2% | Coming soon | Coming soon |
| OSWorld 2.0 | 62.6% | Coming soon | Coming soon |
| CyberGym | 84.5% | Coming soon | Coming soon |
| ExploitGym | 33.7% | Coming soon | Coming soon |
| Toolathlon | 58% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.8% | Coming soon | Coming soon |
| ApprenticeBench | 26% | Coming soon | Coming soon |
| MazeBench | 13% | Coming soon | Coming soon |

### Coding

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 67.1 (Supported · #11/156)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 42.0 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 64.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | 79.9% | GPT-5.6 Sol |
| DeepSWE | 72.7% | 72.6% | GPT-5.6 Sol |
| FrontierCode 1.1 Extended | 60.6% | Coming soon | Coming soon |
| FrontierSWE v2 | 32.2% | Coming soon | Coming soon |
| CursorBench 3.2 | 67.2% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| VulcanBench CII v1 | 86.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.6% | Coming soon | Coming soon |
| SWE-bench (Vals) | 96.2% | Coming soon | Coming soon |
| CursorBench 4.0 | 41.7% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 36.2% | Coming soon | Coming soon |
| FrontierCode 2.0 | 27.6% | Coming soon | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 76.4 (#12/26)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 92.5% | Coming soon | Coming soon |
| ARC-AGI-3 | 7.8% | Coming soon | Coming soon |
| GeneBench-Pro | 28.7% | Coming soon | Coming soon |
| ARC-AGI-1 | 96.50% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 89.9 (#7/58)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 93.77% | Coming soon | Coming soon |
| ParseBench | 74.46% | Coming soon | Coming soon |
| MMMU-Pro | 83% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 84.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 76.3 (Supported · #12/179)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.6% | Coming soon | Coming soon |
| GPQA-D | 94.6% | 90.4% | GPT-5.6 Sol |
| HLE-Verified | 54.5% | Coming soon | Coming soon |
| LABBench2 | 82.1% | Coming soon | Coming soon |
| HealthBench Professional | 60.5% | Coming soon | Coming soon |
| HealthBench Hard | 33.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 95.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.1% | Coming soon | Coming soon |
| MMLU | Coming soon | 86.1% | Coming soon |

### Instruction Following

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 89.1 (#34/157)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 27.0% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 95.8 (Unranked · 3 rankable rows)
- Particle-1 public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 89% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 89.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 83.000% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.6 Sol or Particle-1?

GPT-5.6 Sol is ahead overall on BenchLM right now.

### How many benchmarks does GPT-5.6 Sol cover on BenchLM?

GPT-5.6 Sol currently has 44 sourced benchmark scores on BenchLM.

### How many benchmarks does Particle-1 cover on BenchLM?

Particle-1 currently has 5 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.6 Sol vs GPT-5.6 Terra](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [Particle-1 vs GPT-5.6 Terra](/compare/gpt-5-6-terra-vs-particle-1)
- [GPT-5.6 Sol vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-sol)
- [Particle-1 vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-particle-1)

## Explore More

- [GPT-5.6 Sol profile](/models/gpt-5-6-sol)
- [Particle-1 profile](/models/particle-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)