litellm - 💡(How to fix) Fix When reasoning_effort is set to none, thinking should be automatically disabled(for deepseek-v4)

curl https://api.deepseek.com/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer ${DEEPSEEK_API_KEY}" \
  -d '{
        "model": "deepseek-v4-pro",
        "messages": [
          {"role": "system", "content": "You are a helpful assistant."},
          {"role": "user", "content": "Hello!"}
        ],
        "thinking": {"type": "enable"},
        "reasoning_effort": "high",
        "stream": false
      }'

---

{"id":"b25e727f-3f07-4923-9bb0-bc612d8f6f94","object":"chat.completion","created":1778226044,"model":"deepseek-v4-pro","choices":[{"index":0,"message":{"role":"assistant","content":"Hi there! How can I help you today?","reasoning_content":"We need to respond appropriately. The user said \"Hello!\" so it's a simple greeting. I'll respond with a friendly greeting and ask how I can assist."},"logprobs":null,"finish_reason":"stop"}],"usage":{"prompt_tokens":12,"completion_tokens":44,"total_tokens":56,"prompt_tokens_details":{"cached_tokens":0},"completion_tokens_details":{"reasoning_tokens":33},"prompt_cache_hit_tokens":0,"prompt_cache_miss_tokens":12},"system_fingerprint":"fp_9954b31ca7_prod0820_fp8_kvcache_20260402"}

---

curl https://api.deepseek.com/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer ${DEEPSEEK_API_KEY}" \
  -d '{
        "model": "deepseek-v4-pro",
        "messages": [
          {"role": "system", "content": "You are a helpful assistant."},
          {"role": "user", "content": "Hello!"}
        ],
        "stream": false
      }'

---

{"id":"b25e727f-3f07-4923-9bb0-bc612d8f6f94","object":"chat.completion","created":1778226044,"model":"deepseek-v4-pro","choices":[{"index":0,"message":{"role":"assistant","content":"Hi there! How can I help you today?","reasoning_content":"We need to respond appropriately. The user said \"Hello!\" so it's a simple greeting. I'll respond with a friendly greeting and ask how I can assist."},"logprobs":null,"finish_reason":"stop"}],"usage":{"prompt_tokens":12,"completion_tokens":44,"total_tokens":56,"prompt_tokens_details":{"cached_tokens":0},"completion_tokens_details":{"reasoning_tokens":33},"prompt_cache_hit_tokens":0,"prompt_cache_miss_tokens":12},"system_fingerprint":"fp_9954b31ca7_prod0820_fp8_kvcache_20260402"}

---

curl https://api.deepseek.com/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer ${DEEPSEEK_API_KEY}" \
  -d '{
        "model": "deepseek-v4-pro",
        "messages": [
          {"role": "system", "content": "You are a helpful assistant."},
          {"role": "user", "content": "Hello!"}
        ],
        "thinking": {"type": "disabled"},
        "stream": false
      }'

---

{"id":"07826860-e8db-4772-b59e-24ecf2f57249","object":"chat.completion","created":1778226222,"model":"deepseek-v4-pro","choices":[{"index":0,"message":{"role":"assistant","content":"Hi there! How can I help you today?"},"logprobs":null,"finish_reason":"stop"}],"usage":{"prompt_tokens":12,"completion_tokens":10,"total_tokens":22,"prompt_tokens_details":{"cached_tokens":0},"prompt_cache_hit_tokens":0,"prompt_cache_miss_tokens":12},"system_fingerprint":"fp_9954b31ca7_prod0820_fp8_kvcache_20260402"}