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fix(anthropic): distinguish sampling restrictions

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Reuse adaptive-only version thresholds where the capabilities align, while preserving Mythos Preview's supported manual thinking budgets.
This commit is contained in:
chengyongru 2026-08-04 11:48:35 +08:00
parent 5e0ef36cf2
commit e971f6bb8f
2 changed files with 12 additions and 8 deletions
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13
nanobot/providers/anthropic_provider.py
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@ -41,12 +41,7 @@ _ADAPTIVE_ONLY_MIN_VERSIONS = {
"fable": (5, 0), "fable": (5, 0),
"mythos": (5, 0), "mythos": (5, 0),
} }
_SAMPLING_DEPRECATED_MIN_VERSIONS = { _SAMPLING_DEPRECATED_MODELS = {"claude-mythos-preview"}
"opus": (4, 7),
"sonnet": (5, 0),
"fable": (5, 0),
"mythos": (5, 0),
}
def _model_version_at_least( def _model_version_at_least(
@ -596,8 +591,10 @@ class AnthropicProvider(LLMProvider):
reasoning_effort_lower = reasoning_effort.lower() if reasoning_effort else None reasoning_effort_lower = reasoning_effort.lower() if reasoning_effort else None
thinking_enabled = reasoning_effort_lower not in (None, "", "none") thinking_enabled = reasoning_effort_lower not in (None, "", "none")
adaptive_only = _model_version_at_least(model_name, _ADAPTIVE_ONLY_MIN_VERSIONS) adaptive_only = _model_version_at_least(model_name, _ADAPTIVE_ONLY_MIN_VERSIONS)
omit_temperature = _model_version_at_least( # Mythos Preview rejects sampling parameters but still accepts manual
model_name, _SAMPLING_DEPRECATED_MIN_VERSIONS # thinking budgets, so it is not part of the adaptive-only capability.
omit_temperature = (
adaptive_only or model_name.lower() in _SAMPLING_DEPRECATED_MODELS
) )
kwargs: dict[str, Any] = { kwargs: dict[str, Any] = {

7
tests/providers/test_anthropic_thinking.py
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@ -147,6 +147,13 @@ def test_sonnet_5_omits_temperature_none() -> None:
assert "thinking" not in kw assert "thinking" not in kw
def test_mythos_preview_omits_temperature_but_keeps_manual_budget() -> None:
kw = _build(_make_provider("claude-mythos-preview"), "high", max_tokens=4096)
assert "temperature" not in kw
assert kw["thinking"] == {"type": "enabled", "budget_tokens": 8192}
assert "extra_body" not in kw
@pytest.mark.parametrize("reasoning_effort", [None, "adaptive", "low", "medium", "high", "xhigh", "max"]) @pytest.mark.parametrize("reasoning_effort", [None, "adaptive", "low", "medium", "high", "xhigh", "max"])
def test_opus_5_omits_temperature(reasoning_effort: str | None) -> None: def test_opus_5_omits_temperature(reasoning_effort: str | None) -> None:
kw = _build(_make_provider("claude-opus-5"), reasoning_effort) kw = _build(_make_provider("claude-opus-5"), reasoning_effort)