# NousResearch/hermes-agent · Copilot routing of Responses-only models like grok-4.5

## Open now

- 1 issue, 2 PRs open on GitHub.
- #85213: Copilot: grok-4.5 routed to /chat/completions -> HTTP 400; responses-only model needs Responses API
- PR #85224: fix(copilot): route grok-4.5 to Responses API on GitHub Copilot
- PR #143854: fix(copilot): route Responses-only models via catalog supported_endpoints

These items appear to concern GitHub Copilot requests for grok-4.5 being sent to /chat/completions, which reportedly returns HTTP 400 for a Responses-only model. Two pull requests propose routing such models to the Responses API, one using catalog supported_endpoints and one targeting grok-4.5 specifically.

## TL;DR

- 3 member(s): 1 open issue(s), 0 closed issue(s), 2 open PR(s), 0 merged PR(s), 0 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Open related issues

- #85213: Copilot: grok-4.5 routed to /chat/completions -> HTTP 400; responses-only model needs Responses API

## Prior & competing PRs

- **#85224: fix(copilot): route grok-4.5 to Responses API on GitHub Copilot**. open
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`
  - files: `hermes_cli/models.py`
- **#143854: fix(copilot): route Responses-only models via catalog supported_endpoints**. open
  - maintainer direction: category `silent_close`; implication `active`
  - files: `hermes_cli/models.py`, `hermes_cli/models_copilot_endpoints.py`, `hermes_cli/runtime_provider.py`, `tests/hermes_cli/test_copilot_model_api_mode.py`

## Fix status

- No merged fix on record.
- Subsystem: `hermes_cli`