# NousResearch/hermes-agent · xAI Grok Bedrock Converse sampling params fix

## Open now

- Nothing open on GitHub.

These issues and PRs address a bug where xAI Grok models on AWS Bedrock's Converse API return 400 errors due to unsupported temperature/topP fields. The fix involves extending the sampling params guard beyond Claude-only models to also exclude these fields for xAI Grok.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #111438. Verify it addresses your case.
- **Recommended:** read PR #111438 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `resolved` · deciding PR(s): `pr-111438`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Closed / duplicate issues

- #111043: bedrock_adapter: xAI Grok on Bedrock Converse 400s with "doesn't support the temperature field" — _forbids_sampling_params guard is Claude-only

## Prior & competing PRs

- **#111438: fix(bedrock): xAI Grok on Converse no longer 400s on temperature/topP; aux retry reads Bedrock's rejection wording (#111043, salvage #111054)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/auxiliary_client.py`, `agent/bedrock_adapter.py`, `tests/agent/test_bedrock_adapter.py`, `tests/agent/test_unsupported_parameter_retry.py`
- **#111054: fix(bedrock): omit sampling params for xAI Grok on Converse**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `796aeede6a`, `#111438`

## Fix status

- Merged to main in PR #111438 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-15`.