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fix(provider): match api.anthropic.com host on fallback api_mode detection

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Widen the salvaged #32243 fix to the try_activate_fallback path: a custom
provider pointed at the native api.anthropic.com host (no /anthropic path
suffix, name != anthropic) fell through to chat_completions -> POST
/v1/chat/completions -> 404. Match the host the same way determine_api_mode()
and _detect_api_mode_for_url() now do. Absorbs #49247.
This commit is contained in:
Teknium 2026-07-01 01:59:53 -07:00
parent 9efe01c3a0
commit 18c61bb8cf
1 changed files with 11 additions and 1 deletions
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12
agent/chat_completion_helpers.py
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@ -1241,7 +1241,17 @@ def try_activate_fallback(agent, reason: "FailoverReason | None" = None) -> bool
_fb_is_azure = agent._is_azure_openai_url(fb_base_url)
if fb_provider == "openai-codex":
fb_api_mode = "codex_responses"
elif fb_provider == "anthropic" or fb_base_url.rstrip("/").lower().endswith("/anthropic"):
elif (
fb_provider == "anthropic"
or fb_base_url.rstrip("/").lower().endswith("/anthropic")
or base_url_hostname(fb_base_url) == "api.anthropic.com"
):
# Custom providers (e.g. cron-anthropic) point at the native
# api.anthropic.com host with no "/anthropic" path suffix, so the
# name/suffix checks above miss them and they default to
# chat_completions → POST /v1/chat/completions → 404. Match the
# host the same way determine_api_mode() and _detect_api_mode_for_url()
# do on the primary path. (#32243, #49247)
fb_api_mode = "anthropic_messages"
elif _fb_is_azure:
# Azure OpenAI serves gpt-5.x on /chat/completions — does NOT