# Mercury 2.5 vs Particle-1

> Side-by-side benchmark comparison for Mercury 2.5 and Particle-1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/mercury-2-5-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: Mercury 2.5 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.
- Mercury 2.5 has the lower published output-token price.
- Particle-1 has the larger published context window at 1M.

## Model Snapshot

| Property | Mercury 2.5 | Particle-1 |
|----------|----------|----------|
| Creator | Inception | Particle AI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 260K | 1M |
| Independent public score (not head-to-head) | 33.41 | null |
| Benchmarks Covered | 6 | 5 |
| Pricing (input/output) | $0.04 / $0.15 | $0.25 / $1.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Mercury 2.5 public-lane score: 14.9 (Supported · #131/135)
- Particle-1 public-lane score: Coming soon

| Benchmark | Mercury 2.5 | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| τ³-bench results | 96.0% | Coming soon | Coming soon |
| DeepSearchQA | 34.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 34.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 79.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Mercury 2.5 public-lane score: 21.3 (Estimated · #133/156)
- Particle-1 public-lane score: Coming soon

| Benchmark | Mercury 2.5 | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| SciCode | 38% | 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
- Mercury 2.5 public-lane score: 71.7 (Unranked · 2 rankable rows)
- Particle-1 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Mercury 2.5 public-lane score: 34.8 (Supported · #135/179)
- Particle-1 public-lane score: Coming soon

| Benchmark | Mercury 2.5 | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 79.0% | 90.4% | Particle-1 |
| MMLU | Coming soon | 86.1% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Mercury 2.5 public-lane score: 81.1 (#62/157)
- Particle-1 public-lane score: Coming soon

| Benchmark | Mercury 2.5 | Particle-1 | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 77% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Mercury 2.5 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

- [Mercury 2.5 vs Mercury 2.5 Preview](/compare/mercury-2-5-vs-mercury-2-5-preview)
- [Particle-1 vs Mercury 2.5 Preview](/compare/mercury-2-5-preview-vs-particle-1)
- [Mercury 2.5 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-mercury-2-5)
- [Particle-1 vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-particle-1)

## Explore More

- [Mercury 2.5 profile](/models/mercury-2-5)
- [Particle-1 profile](/models/particle-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)