diff --git a/astrbot/core/provider/sources/openai_source.py b/astrbot/core/provider/sources/openai_source.py
index 64e3a6645a..6d8f6e6df5 100644
--- a/astrbot/core/provider/sources/openai_source.py
+++ b/astrbot/core/provider/sources/openai_source.py
@@ -1,7 +1,9 @@
 import asyncio
 import base64
 import copy
+import hashlib
 import inspect
+
 import json
 import random
 import re
@@ -562,6 +564,96 @@ def _is_empty(content: Any) -> bool:
 
         payloads["messages"] = cleaned
 
+    @staticmethod
+    def _shorten_tool_call_id(raw_id: str | None) -> str | None:
+        """Deterministically shorten an oversized tool_call ID.
+
+        Non-cryptographic by design; MUST NOT be used for any
+        security-sensitive purpose. Its only job is to normalize IDs
+        that exceed the 64-character limit enforced by the OpenAI API
+        spec into a stable, compact form so the same ID collapses to
+        the same short form across retries of the same request.
+
+        Short IDs (or empty/None) are returned unchanged.
+        """
+        if not raw_id or len(raw_id) <= 64:
+            return raw_id
+        # MD5 is used purely for deterministic compact hashing, not security.
+        return "call_" + hashlib.md5(raw_id.encode("utf-8")).hexdigest()
+
+    @staticmethod
+    def _normalize_tool_call_ids(payloads: dict) -> None:
+        """Normalize oversized tool_call IDs in outgoing payloads.
+
+        Some OpenAI-compatible relay services return tool_call IDs that
+        far exceed the 64-character limit enforced by the OpenAI API spec
+        (observed lengths of 660 / 1650+ chars in the wild). Round-tripping
+        those IDs into the next request's ``messages[].tool_calls[].id`` or
+        ``tool_call_id`` fields triggers HTTP 400 ``string_above_max_length``
+        from the upstream. Some relays internally translate Chat Completions
+        payloads into the Responses API format, which renames
+        ``tool_call_id`` to ``call_id`` — but the root cause is the same.
+
+        A shared map keeps assistant ``tool_calls[].id`` and its matching
+        tool ``tool_call_id`` in sync after normalization. The conversation
+        history is mutated in place.
+        """
+        messages = payloads.get("messages")
+        if not isinstance(messages, list):
+            return
+
+        id_map: dict[str, str] = {}
+
+        def _register(tid: str | None) -> None:
+            if not tid or tid in id_map or len(tid) <= 64:
+                return
+            shortened = ProviderOpenAIOfficial._shorten_tool_call_id(tid)
+            if shortened is not None and shortened != tid:
+                id_map[tid] = shortened
+
+        # First pass: collect every oversized ID.
+        for msg in messages:
+            if not isinstance(msg, dict):
+                continue
+            role = msg.get("role")
+
+            if role == "assistant":
+                tool_calls = msg.get("tool_calls")
+                if isinstance(tool_calls, list):
+                    for tc in tool_calls:
+                        if isinstance(tc, dict):
+                            _register(tc.get("id"))
+            elif role == "tool":
+                _register(msg.get("tool_call_id"))
+
+        if not id_map:
+            return
+
+        logger.warning(
+            "Normalized %d oversized tool_call ID(s) before sending request.",
+            len(id_map),
+        )
+
+        # Second pass: apply the rewrite map.
+        for msg in messages:
+            if not isinstance(msg, dict):
+                continue
+            role = msg.get("role")
+
+            if role == "assistant":
+                tool_calls = msg.get("tool_calls")
+                if isinstance(tool_calls, list):
+                    for tc in tool_calls:
+                        if not isinstance(tc, dict):
+                            continue
+                        tid = tc.get("id")
+                        if tid in id_map:
+                            tc["id"] = id_map[tid]
+            elif role == "tool":
+                tid = msg.get("tool_call_id")
+                if tid and tid in id_map:
+                    msg["tool_call_id"] = id_map[tid]
+                    
     async def _query(self, payloads: dict, tools: ToolSet | None) -> LLMResponse:
         if tools:
             model = payloads.get("model", "").lower()
@@ -592,6 +684,7 @@ async def _query(self, payloads: dict, tools: ToolSet | None) -> LLMResponse:
         model = payloads.get("model", "").lower()
 
         self._sanitize_assistant_messages(payloads)
+        self._normalize_tool_call_ids(payloads)
 
         completion = await self.client.chat.completions.create(
             **payloads,
@@ -644,6 +737,7 @@ async def _query_stream(
         self._apply_provider_specific_extra_body_overrides(extra_body)
 
         self._sanitize_assistant_messages(payloads)
+        self._normalize_tool_call_ids(payloads)
 
         stream = await self.client.chat.completions.create(
             **payloads,
@@ -903,13 +997,27 @@ async def _parse_openai_completion(
                         args = tool_call.function.arguments
                     args_ls.append(args)
                     func_name_ls.append(tool_call.function.name)
-                    tool_call_ids.append(tool_call.id)
+
+                    raw_id = tool_call.id
+                    safe_id = self._shorten_tool_call_id(raw_id)
+                    if raw_id and safe_id != raw_id:
+                        # Log only the length and the normalized short ID —
+                        # the raw ID is opaque and may be provider-specific,
+                        # so we avoid leaking its prefix into logs.
+                        logger.warning(
+                            "tool_call.id exceeded 64 chars (length=%d); "
+                            "normalized to %s",
+                            len(raw_id),
+                            safe_id,
+                        )
+
+                    tool_call_ids.append(safe_id)
 
                     # gemini-2.5 / gemini-3 series extra_content handling
                     extra_content = getattr(tool_call, "extra_content", None)
                     if extra_content is not None:
-                        tool_call_extra_content_dict[tool_call.id] = extra_content
-
+                        tool_call_extra_content_dict[safe_id] = extra_content
+                        
             llm_response.role = "tool"
             llm_response.tools_call_args = args_ls
             llm_response.tools_call_name = func_name_ls