# Gemini 4 Argon vs Muse Spark 1.2 Contributor - AI Model Comparison

- Page: https://opencode.ai/data/compare/google/gemini-4-argon/meta/muse-spark-1-2-contributor
- Updated: 2026-10-13T17:12:37.000Z

|  | Gemini 4 Argon | Muse Spark 1.2 Contributor |
| --- | --- | --- |
| Lab | Google | Meta |
| Context window | 1M | 1M |
| Max output | 66K | 131K |
| Input modalities | text, image, video, audio, pdf | text, image, video, pdf, audio |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Open weights | No | No |
| Release date | 2026-10-13 | 2026-08-05 |
| Input price per 1M tokens | $4.00 | $0.10 |
| Output price per 1M tokens | $20.00 | $0.20 |
| Cached input price per 1M tokens | $0.20 | $0.0020 |
| OpenCode tokens: past 2 months | - | 39T |
| Share of all tokens | - | 4.0% |
| Rank by tokens last week | - | #17 |
| Unique users | - | 466K |
| Weekly retention | - | 78.3% |

Model pages: [Gemini 4 Argon](https://opencode.ai/data/google/gemini-4-argon.md), [Muse Spark 1.2 Contributor](https://opencode.ai/data/meta/muse-spark-1-2-contributor.md)

## Methodology

- Updates: Aggregated every hour. Days and weeks use UTC.
- Tokens: Input, output, reasoning, and cached tokens for each request.
- Users and sessions: Approximate counts of distinct users and OpenCode sessions.
- Cost: Session cost is the average cost per OpenCode session. Token prices are list prices from the OpenCode model catalog.
- Retention: The share of a model's users in one week who use it again the next week.
- Citation: Cite OpenCode Data (opencode.ai/data) with the update time shown at the top of the page.