diff --git a/unstract/sdk1/src/unstract/sdk1/adapters/base1.py b/unstract/sdk1/src/unstract/sdk1/adapters/base1.py
index f396bd618c..492b71c711 100644
--- a/unstract/sdk1/src/unstract/sdk1/adapters/base1.py
+++ b/unstract/sdk1/src/unstract/sdk1/adapters/base1.py
@@ -24,11 +24,17 @@
 # AI Foundry / Vertex proxies). Opus 4.6 / Sonnet 4.6 and older still accept
 # them, so detection is a narrow allowlist rather than a broad `claude-*` match.
 #
-# Each stem is compiled into a pattern that is regex-searched against the model
-# id after lowercasing and normalizing `.` / `_` to `-`. The match is anchored
-# at the trailing edge so unrelated future ids (`claude-sonnet-50`,
-# `claude-opus-4-70`, `claude-sonnet-5verbose`) do not match. One stem covers
-# every encoding of the id we have observed, e.g. for `claude-sonnet-5`:
+# Detection is a mix of literal stems and Opus family ranges. The Opus ranges
+# cover every Opus release from 4.7 onwards — 4.7, 4.8, 4.9 and every Opus 5+
+# release — so a new Opus id does not need a code change; the other families
+# (Sonnet 5, Fable 5, Mythos 5) are listed as literal stems.
+#
+# Each entry is compiled into a pattern that is regex-searched against the
+# model id after lowercasing and normalizing `.` / `_` to `-`. The match is
+# anchored at the trailing edge so unrelated future ids (`claude-sonnet-50`,
+# `claude-opus-4-70`, `claude-opus-50`, `claude-sonnet-5verbose`) do not
+# match. One entry covers every encoding of the id we have observed, e.g. for
+# `claude-sonnet-5`:
 #   - Native Anthropic              `claude-sonnet-5`, `anthropic/claude-sonnet-5`
 #   - Bedrock foundation model      `anthropic.claude-sonnet-5-<date>-v1:0`
 #   - Bedrock cross-region profile  `us.anthropic.claude-sonnet-5-...`,
@@ -42,23 +48,34 @@
 # Leading text (route prefixes like `converse/`, `invoke/`, `bedrock/`) passes
 # through because the regex is anchored only at the trailing edge.
 # Keep this list current — add a stem here when Anthropic deprecates sampling on
-# a new model.
+# a new (non-Opus) model.
 # Trailing anchor allows: end-of-string, or one of `-`/`:`/`@`/`/` (the
 # delimiters used in date suffixes, ARN paths, Vertex `@<date>`, and the
 # `v1:0` tag), or `v` followed by a digit (the version-tag start). A bare
 # `v` is intentionally rejected so alpha continuations like `sonnet-5verbose`
 # do not silently match.
-# See https://docs.claude.com/en/about-claude/models/overview
+# See https://docs.claude.com/en/about-claude/models/overview and
+# https://docs.claude.com/en/about-claude/models/whats-new-claude-4-7
+_SAMPLING_TRAILING_EDGE: str = r"(?=$|[-:@/]|v\d)"
 _SAMPLING_DEPRECATED_MODEL_STEMS: tuple[str, ...] = (
-    "claude-opus-4-7",
-    "claude-opus-4-8",
     "claude-sonnet-5",
     "claude-fable-5",
     "claude-mythos-5",
 )
+# Regex fragments (not escaped) for model families where a whole version range
+# is deprecated. `claude-opus-4-[789]` covers 4.7–4.9 but not a hypothetical
+# `claude-opus-4-10`; Anthropic's cadence makes an Opus 5 jump far more likely,
+# and Opus 5+ is covered by the second entry.
+_SAMPLING_DEPRECATED_MODEL_FAMILIES: tuple[str, ...] = (
+    r"claude-opus-4-[789]",  # Opus 4.7, 4.8, 4.9
+    r"claude-opus-[5-9]",  # Opus 5 and later
+)
 _SAMPLING_DEPRECATED_MODEL_PATTERNS: tuple[re.Pattern[str], ...] = tuple(
-    re.compile(rf"{re.escape(stem)}(?=$|[-:@/]|v\d)")
-    for stem in _SAMPLING_DEPRECATED_MODEL_STEMS
+    re.compile(rf"{fragment}{_SAMPLING_TRAILING_EDGE}")
+    for fragment in (
+        *(re.escape(stem) for stem in _SAMPLING_DEPRECATED_MODEL_STEMS),
+        *_SAMPLING_DEPRECATED_MODEL_FAMILIES,
+    )
 )
 _DEPRECATED_SAMPLING_PARAMS: tuple[str, ...] = ("temperature", "top_p", "top_k")
 # Fields whose value can carry a model id. `model` is universal; `model_id` is
@@ -90,7 +107,9 @@ def _has_deprecated_sampling_params(model: str | None) -> bool:
     Claude Opus 4.7, and every model released since (Opus 4.8, Sonnet 5,
     Fable 5, Mythos 5) rejects them too; sending any of them yields a 400 from
     Anthropic and from the providers that proxy it (Bedrock, Azure AI Foundry,
-    Vertex AI). See `_SAMPLING_DEPRECATED_MODEL_STEMS` for the covered set.
+    Vertex AI). Every Opus release from 4.7 onwards (4.7, 4.8, 4.9, Opus 5+)
+    is covered by version-range patterns; see `_SAMPLING_DEPRECATED_MODEL_STEMS`
+    and `_SAMPLING_DEPRECATED_MODEL_FAMILIES` for the covered set.
 
     The check normalizes case and `.`/`_` separators to `-`, then regex-
     searches against the patterns with a trailing-edge boundary, so
diff --git a/unstract/sdk1/tests/test_sampling_strip.py b/unstract/sdk1/tests/test_sampling_strip.py
index d6d792a3d7..fa7691c3d0 100644
--- a/unstract/sdk1/tests/test_sampling_strip.py
+++ b/unstract/sdk1/tests/test_sampling_strip.py
@@ -1,9 +1,9 @@
 """Tests for the Claude sampling-parameter strip.
 
-Covers Claude Opus 4.7 and every model released since (Opus 4.8, Sonnet 5,
-Fable 5, Mythos 5), all of which reject `temperature`/`top_p`/`top_k`. Sonnet 5
-is the model behind the reported Azure AI Foundry `temperature is deprecated`
-failure.
+Covers Claude Opus 4.7 and every model released since — every Opus release from
+4.7 onwards (4.7, 4.8, 4.9, Opus 5+) plus Sonnet 5, Fable 5 and Mythos 5 — all
+of which reject `temperature`/`top_p`/`top_k`. Sonnet 5 is the model behind the
+reported Azure AI Foundry `temperature is deprecated` failure.
 
 Pins the detection regex and the four-adapter wiring against the failure
 modes that surfaced in PR #1934 review:
@@ -65,6 +65,25 @@
     # Version tag accepted only as `v\d` after the trailing edge
     "claude-opus-4-7v1",
     "claude-opus-4-7v9",
+    # Opus 4.8 / 4.9 — same deprecation, representative encodings
+    "claude-opus-4-8",
+    "anthropic/claude-opus-4-8",
+    "anthropic.claude-opus-4-8-20260101-v1:0",
+    "us.anthropic.claude-opus-4-8-20260101-v1:0",
+    "arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-opus-4-8-20260101-v1:0",
+    "vertex_ai/claude-opus-4-8@20260101",
+    "azure_ai/claude-opus-4-8",
+    "azure_ai/my-claude-opus-4-8-deployment",
+    "claude.opus.4.8",
+    "claude-opus-4-9",
+    # Opus 5 and later
+    "claude-opus-5",
+    "claude-opus-5-0",
+    "anthropic/claude-opus-5-0",
+    "anthropic.claude-opus-5-0-20270101-v1:0",
+    "us.anthropic.claude-opus-5-0-20270101-v1:0",
+    "vertex_ai/claude-opus-5-0@20270101",
+    "claude-opus-6-0",
 ]
 
 
@@ -73,8 +92,9 @@ def test_has_deprecated_sampling_params_positive(model: str) -> None:
     assert _has_deprecated_sampling_params(model)
 
 
-# Every Claude model released after Opus 4.7 also rejects sampling params
-# (Opus 4.8, Sonnet 5, Fable 5, Mythos 5). Sonnet 5 is the model behind the
+# Every Claude model released after Opus 4.7 also rejects sampling params.
+# Opus 4.8+ is covered above; the non-Opus families (Sonnet 5, Fable 5,
+# Mythos 5) are listed as literal stems. Sonnet 5 is the model behind the
 # reported Azure AI Foundry `temperature is deprecated` failure.
 POST_47_POSITIVES: list[str] = [
     # Sonnet 5 — native, Azure AI Foundry (prefixed by validate_model), case,
@@ -90,10 +110,6 @@ def test_has_deprecated_sampling_params_positive(model: str) -> None:
     "claude-sonnet-5v1",  # version tag
     "anthropic.claude-sonnet-5-20260101-v1:0",  # Bedrock foundation model id
     "vertex_ai/claude-sonnet-5@20260101",  # Vertex AI
-    # Opus 4.8
-    "claude-opus-4-8",
-    "anthropic.claude-opus-4-8-20260101-v1:0",
-    "azure_ai/claude-opus-4-8",
     # Fable 5 / Mythos 5
     "claude-fable-5",
     "vertex_ai/claude-fable-5@20260101",
@@ -142,6 +158,13 @@ def test_has_deprecated_sampling_params_positive_post_opus_47(model: str) -> Non
     "claude-opus-4-7verbose",
     "claude-opus-4-7vnext",
     "claude-opus-4-7variant",
+    # Opus 5+ boundary: the major must end at a delimiter, not run into more
+    # digits or letters.
+    "claude-opus-50",
+    "claude-opus-5verbose",
+    # Opus 4.1–4.6 still accept sampling params; only 4.7+ is deprecated.
+    "claude-opus-4-1",
+    "anthropic.claude-opus-4-1-20250805-v1:0",
     # Opaque Bedrock Application Inference Profile ARN — model id is not
     # recoverable from the string. Strip-detection is expected to skip;
     # callers must keep the standard id in `model` or `model_id`.