# NousResearch/hermes-agent · DeepSeek/Anthropic thinking mode explicit disable fixes

## Open now

- Nothing open on GitHub.

These issues and PRs address problems where omitting an explicit 'thinking: disabled' parameter causes API errors on DeepSeek and Anthropic third-party endpoints. The work involves wiring thinking/reasoning_effort mode settings explicitly through provider profiles and API calls.

## TL;DR

- 5 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 3 PR(s) closed without merging.
- A fix was merged to main in PR #26648. Verify it addresses your case.
- **Recommended:** read PR #26648 (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-26648`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.40`: 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

- #15700: DeepSeek API: Missing 'thinking: disabled' parameter causes 400 error

## Prior & competing PRs

- **#15712: fix(anthropic): send thinking=disabled explicitly on third-party endpoints (#15700)**. closed without merge · fix tier `suggested`
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `#15700`, `#26648`, `#15700`, `#17212`, `#17825`
  - _suggested-tier fix detail withheld; re-request with `?tier=all` to include it._
- **#21668: fix(deepseek): send explicit thinking:disabled when reasoning is off**. closed without merge · fix tier `suggested`
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `cd9470f41638bd515db096cd934c463205790110`, `068c24f8a4203e86de32b0d84ccaf047e8cd6ef7`, `#17225`
  - _suggested-tier fix detail withheld; re-request with `?tier=all` to include it._
- **#26648: fix(deepseek): wire thinking-mode via DeepSeekProfile (closes #15700, #17212, #17825)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `plugins/model-providers/deepseek/__init__.py`, `scripts/release.py`, `tests/plugins/model_providers/test_deepseek_profile.py`
- **#22218: fix(deepseek): add native thinking/reasoning_effort support**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `cd9470f41638bd515db096cd934c463205790110`

## Fix status

- Merged to main in PR #26648 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-05-16`.
- Subsystem: `agent/transports`