opencode: Model updates (GPT 5.6 + Grok 4.5) (#60852)
# Objective
Adding newly-released OpenCode models.
## Solution
**OpenCode Go**:
- no changes
**OpenCode Zen**:
- added GPT 5.6 Luna, GPT 5.6 Terra, GPT 5.6 Sol using raw data from
Models.dev repo
(66dcd837fe/providers/opencode/models
and
66dcd837fe/models/openai)
- added Grok 4.5 using raw data from Models.dev repo
(66dcd837fe/providers/opencode/models/grok-4.5.toml
and
66dcd837fe/models/xai/grok-4.5.toml)
**OpenCode Free**:
- as per
https://github.com/zed-industries/zed/issues/56869#issuecomment-4466637648,
no changes as it's unclear what models are long-term free models
## Testing
**Not tested at all**, since I don't have an OpenCode Zen subscription
(since I am in the EU, I think I am also blocked from using Grok?).
## Self-Review Checklist:
- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content adheres to Zed's UI standards
([UX/UI](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
and
[icon](https://github.com/zed-industries/zed/blob/main/crates/icons/README.md)
guidelines)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable
## Showcase
N/A
---
Release Notes:
- Agent: OpenCode Zen model updates (added GPT 5.6 Luna, GPT 5.6 Terra,
GPT 5.6 Sol, and Grok 4.5)
ad5763eba4