# ocz/muse-spark-1.3-contributor vs GPT-5 Nano - AI Model Comparison

- Page: https://opencode.ai/data/compare/meta/ocz-muse-spark-1-3-contributor/openai/gpt-5-nano
- Updated: 2026-10-02T10:37:25.000Z

|  | ocz/muse-spark-1.3-contributor | GPT-5 Nano |
| --- | --- | --- |
| Lab | Meta | OpenAI |
| Context window | - | 400K |
| Max output | - | 128K |
| Input modalities | - | text, image |
| Reasoning | - | Yes |
| Tool calling | - | Yes |
| Open weights | - | No |
| Release date | - | 2025-08-07 |
| Input price per 1M tokens | - | $0.05 |
| Output price per 1M tokens | - | $0.40 |
| Cached input price per 1M tokens | - | $0.0050 |
| OpenCode tokens: past 2 months | 12K | 7.7B |
| Share of all tokens | 0% | 0% |
| Rank by tokens last week | #50 | #44 |
| Unique users | 1 | 16K |
| Weekly retention | - | - |

Model pages: [ocz/muse-spark-1.3-contributor](https://opencode.ai/data/meta/ocz-muse-spark-1-3-contributor.md), [GPT-5 Nano](https://opencode.ai/data/openai/gpt-5-nano.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.