Harnesses
Compare Claude Code and Codex features supported by Ellipsis.
A harness runs your agent. Ellipsis supports Claude Code and Codex.
Feature support
Support below applies to sessions on Ellipsis.
| Feature | Claude Code | Codex |
|---|---|---|
| Coding tasks | Supported | Supported |
| Follow-up messages | Supported | Supported |
| Resume conversations | Supported | Supported |
| Saved automations | Supported | Supported |
| Structured input | Supported | Supported |
| Structured output | Supported (Claude Opus 5 only) | Supported |
| Repository instruction references | Supported | Supported |
| MCP servers | Not supported | Supported |
| Explicit skill references | Not supported | Supported |
| Image input | Not supported | Supported |
| Native settings | Not supported | Not supported |
| Effort configuration | Not supported | Not supported |
| Fallback model | Not supported | Not supported |
| Claude subscription | Supported (eligible Claude sessions) | Not supported |
| ChatGPT subscription | Not supported | Not supported |
See pricing for subscription eligibility and charges.
Models
Claude Code supports the listed Claude models, GLM-5.2, and MiniMax M3. Codex supports GPT-5.6 Sol, Terra, and Luna. See model prices for the full list.
Select the harness and model with harness.