Problem

DeepSeek V4 Pro/Flash thinking mode requires two parameters to control thinking effort:

1. *$reasoning_effort — top-level API parameter (high / max)
2. $thinking$ — {"type": "enabled/disabled"} in extra_body

Per DeepSeek API docs:

response = client.chat.completions.create(
    model="deepseek-v4-pro",
    reasoning_effort="max",
    extra_body={"thinking": {"type": "enabled"}}
)

Previously, Hermes only passed these parameters for Kimi (api.kimi.com / moonshot.ai). When using DeepSeek via a custom provider or the deepseek provider name, no reasoning parameters were sent — the API relied on DeepSeek's own defaults (thinking=enabled, effort=high). Users had no way to control the effort level.

Changes

3 files, +34 −2

How It Works

• User sets reasoning_effort: max in config.yaml
• Hermes detects DeepSeek provider (name deepseek or api.deepseek.com base URL)
• Sends reasoning_effort="max" + extra_body={"thinking": {"type": "enabled"}}
• DeepSeek uses max thinking effort for the response

Testing

• All 41 existing test_chat_completions.py tests pass
• 177/178 reasoning-related tests pass (1 pre-existing failure in test_deepseek_reasoning_content_echo.py, not caused by this change)

Tested on

• macOS 14 (Intel, x86_64)