# GPT-6.1 Sol vs Mercury 2

> Mercury 2 has enough public results to be ranked (#167); GPT-6.1 Sol does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gpt-6-1-sol-vs-mercury-2
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-6.1 Sol leads 51.4 to 33.2.
- Mercury 2 is cheaper at $0.25 / $0.75 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 128K.

## Snapshot

| | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| Provider | OpenAI | Inception |
| Noometry Index | 42.1 | 38.8 |
| Rank | — | 167 |
| Context | 1.05M | 128K |
| Input $/M | $2 | $0.25 |
| Output $/M | $10 | $0.75 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-6.1 Sol: 51.4
- Mercury 2: 33.2 (#250)

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| DeepSWE | 75.2% | — |
| LMArena WebDev | — | 1170 |
| SciCode | — | 38.7% |
| WeirdML | — | 43.2% |
| LMArena Coding | — | 1391 |
| ALE-Bench | — | 785.58 |

## Agentic & Tool Use

- GPT-6.1 Sol: 34.3
- Mercury 2: —

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| GDP.pdf | 32% | — |

## Reasoning

- GPT-6.1 Sol: —
- Mercury 2: 23.0 (#170)

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| CritPt | — | 0.8% |
| LMArena Hard Prompts | — | 1362 |

## Knowledge

- GPT-6.1 Sol: —
- Mercury 2: 35.6 (#170)

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| Vectara Hallucination Rate | — | 12.3% |
| LMArena Expert | — | 1358 |

## Multilingual

- GPT-6.1 Sol: —
- Mercury 2: 46.8 (#153)

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| LMArena Non-English | — | 1331 |
| LMArena Chinese | — | 1416 |
| LMArena Russian | — | 1303 |

## Instruction Following

- GPT-6.1 Sol: —
- Mercury 2: 70.4 (#161)

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| LMArena Instruction Following | — | 1328 |

## Long Context

- GPT-6.1 Sol: —
- Mercury 2: 40.4 (#149)

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| LMArena Longer Query | — | 1329 |

## Writing & Preference

- GPT-6.1 Sol: —
- Mercury 2: 54.0 (#151)

| Benchmark | GPT-6.1 Sol | Mercury 2 |
|---|---|---|
| LMArena Text | — | 1355 |
| LMArena Creative Writing | — | 1289 |
| LMArena Multi-Turn | — | 1358 |

## FAQ

### Is GPT-6.1 Sol better than Mercury 2?

Mercury 2 has enough public results to be ranked (#167); GPT-6.1 Sol does not yet, so treat this comparison as directional.

### Which is cheaper, GPT-6.1 Sol or Mercury 2?

Mercury 2 is cheaper. It lists at $0.25 per million input tokens and $0.75 per million output tokens; GPT-6.1 Sol lists at $2 and $10.

### Is GPT-6.1 Sol or Mercury 2 better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 51.4 versus 33.2 in the Noometry coding category.

### Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 128K.

### How many benchmarks do GPT-6.1 Sol and Mercury 2 share?

0 benchmarks have published results for both models. GPT-6.1 Sol has 2 scored results on Noometry and Mercury 2 has 17.