# GPT-5.6 Luna vs cat-jam - AI Model Comparison

- Page: https://opencode.ai/data/compare/openai/gpt-5-6-luna/unknown/cat-jam
- Updated: 2026-10-14T08:18:16.000Z

|  | GPT-5.6 Luna | cat-jam |
| --- | --- | --- |
| Lab | OpenAI | Unknown |
| Context window | 1.1M | - |
| Max output | 128K | - |
| Input modalities | text, image, pdf | - |
| Reasoning | Yes | - |
| Tool calling | Yes | - |
| Open weights | No | - |
| Release date | 2026-07-09 | - |
| Input price per 1M tokens | $0.20 | - |
| Output price per 1M tokens | $1.20 | - |
| Cached input price per 1M tokens | $0.02 | - |
| OpenCode tokens: past 2 months | 3.7T | 232B |
| Share of all tokens | 0.4% | 0.0% |
| Rank by tokens last week | #25 | #21 |
| Unique users | 434K | 11K |
| Weekly retention | 58.3% | - |

Model pages: [GPT-5.6 Luna](https://opencode.ai/data/openai/gpt-5-6-luna.md), [cat-jam](https://opencode.ai/data/unknown/cat-jam.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.