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fix(anthropic): skip thinking params for Haiku models

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Haiku models don't support extended thinking at all. Without this
guard, claude-haiku-4-5-20251001 would receive type=enabled +
budget_tokens and return a 400 error.

Incorporates the fix from PR #1127 (by frizynn) on top of #1128's
adaptive thinking refactor.

Verified live with Claude Code OAuth:
  claude-opus-4-6       → adaptive thinking ✓
  claude-haiku-4-5      → no thinking params ✓
  claude-sonnet-4       → enabled thinking ✓
This commit is contained in:
teknium1
2026-03-12 19:34:55 -07:00
parent 15911d70c0
commit 638136e353
1 changed files with 2 additions and 1 deletions
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3
agent/anthropic_adapter.py
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@@ -414,8 +414,9 @@ def build_anthropic_kwargs(
# Map reasoning_config to Anthropic's thinking parameter.
# Claude 4.6 models use adaptive thinking + output_config.effort.
# Older models use manual thinking with budget_tokens.
# Haiku models do NOT support extended thinking at all — skip entirely.
if reasoning_config and isinstance(reasoning_config, dict):
if reasoning_config.get("enabled") is not False:
if reasoning_config.get("enabled") is not False and "haiku" not in model.lower():
effort = str(reasoning_config.get("effort", "medium")).lower()
budget = THINKING_BUDGET.get(effort, 8000)
if _supports_adaptive_thinking(model):