OpenCode Go lists Ox Alpha Free as a limited-time model

OpenCode's Go page now names Ox Alpha Free in the model list and labels it as available for a limited time. Its Go documentation also describes the route as a free model and links it to the OpenCode Go API.

That confirms a provider availability change. It does not establish a separate model launch by xAI, OpenAI or another named lab. OpenCode's documentation calls the model stealth, so the underlying developer is not identified.

The AIMI endpoint monitor first saw x-preview-f-free on OpenCode Go at 10:19:21 SAST. At 10:36:47 SAST, the same Go endpoint removed x-preview-f-free and added ox-alpha-free. The gap was 17 minutes and 26 seconds.

OpenCode's current page still documents x-preview-f-free as the API model ID, while the live endpoint now returns ox-alpha-free. For new tests, use the live endpoint as the availability check and expect the documentation to catch up with the rename.

There is no public model card, weights repository or benchmark sheet attached to the Ox Alpha Free listing. OpenCode's announcement claims a 1M-token context and multimodal input, but it does not identify the developer. The name alone is not evidence that it comes from xAI, despite the earlier x-preview identifier.

OpenCode also says the provider follows a zero-retention policy and does not use requests for model training. That is a provider statement, not an independent audit, and the limited-time route can change without notice.

Treat ox-alpha-free as an experimental provider route. Check https://opencode.ai/zen/go/v1/models before each test, keep a fallback model ready, and avoid sending confidential material until you have reviewed the current provider terms.

The route is useful for comparing agent behaviour during its free window, but there is not enough public information to make a capability or production-reliability claim. Record the exact route ID and date with any evaluation results.