From 9239429a00b1e2226503a2aae66ab63d98430cde Mon Sep 17 00:00:00 2001
From: 04cb <0x04cb@gmail.com>
Date: Fri, 24 Apr 2026 09:01:22 +0800
Subject: [PATCH] fix(anthropic): omit temperature for opus-4-7 (#3417)

---
 nanobot/providers/anthropic_provider.py    | 12 +++++++++---
 tests/providers/test_anthropic_thinking.py |  6 ++++++
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/nanobot/providers/anthropic_provider.py b/nanobot/providers/anthropic_provider.py
index f88bba62..5d6d36b7 100644
--- a/nanobot/providers/anthropic_provider.py
+++ b/nanobot/providers/anthropic_provider.py
@@ -436,6 +436,10 @@ class AnthropicProvider(LLMProvider):
         max_tokens = max(1, max_tokens)
         thinking_enabled = bool(reasoning_effort)
 
+        # claude-opus-4-7 deprecated the `temperature` parameter entirely — the
+        # API returns 400 if it is present, on any code path.
+        omit_temperature = "opus-4-7" in model_name
+
         kwargs: dict[str, Any] = {
             "model": model_name,
             "messages": anthropic_msgs,
@@ -450,14 +454,16 @@ class AnthropicProvider(LLMProvider):
             # Supported on claude-sonnet-4-6 and claude-opus-4-6.
             # Also auto-enables interleaved thinking between tool calls.
             kwargs["thinking"] = {"type": "adaptive"}
-            kwargs["temperature"] = 1.0
+            if not omit_temperature:
+                kwargs["temperature"] = 1.0
         elif thinking_enabled:
             budget_map = {"low": 1024, "medium": 4096, "high": max(8192, max_tokens)}
             budget = budget_map.get(reasoning_effort.lower(), 4096)
             kwargs["thinking"] = {"type": "enabled", "budget_tokens": budget}
             kwargs["max_tokens"] = max(max_tokens, budget + 4096)
-            kwargs["temperature"] = 1.0
-        else:
+            if not omit_temperature:
+                kwargs["temperature"] = 1.0
+        elif not omit_temperature:
             kwargs["temperature"] = temperature
 
         if anthropic_tools:
diff --git a/tests/providers/test_anthropic_thinking.py b/tests/providers/test_anthropic_thinking.py
index ab8942e1..12e2e167 100644
--- a/tests/providers/test_anthropic_thinking.py
+++ b/tests/providers/test_anthropic_thinking.py
@@ -63,3 +63,9 @@ def test_none_does_not_enable_thinking() -> None:
     kw = _build(_make_provider(), None)
     assert "thinking" not in kw
     assert kw["temperature"] == 0.7
+
+
+def test_opus_4_7_omits_temperature() -> None:
+    kw = _build(_make_provider("claude-opus-4-7"), "adaptive")
+    assert "temperature" not in kw
+    assert kw["thinking"] == {"type": "adaptive"}