diff --git a/agent/anthropic_adapter.py b/agent/anthropic_adapter.py
index e4d1d5ac125e..89c232e9f90a 100644
--- a/agent/anthropic_adapter.py
+++ b/agent/anthropic_adapter.py
@@ -126,6 +126,8 @@ def _is_claude_model(model: str | None) -> bool:
 _ANTHROPIC_OUTPUT_LIMITS = {
     # Mythos-class named models (claude-fable-5, …) — 1M context, reasoning
     "claude-fable":      128_000,
+    # Claude Sonnet 5
+    "claude-sonnet-5":   128_000,
     # Claude 4.8
     "claude-opus-4-8":   128_000,
     # Claude 4.7
diff --git a/agent/bedrock_adapter.py b/agent/bedrock_adapter.py
index d5dab7bafff2..606b2925ce9e 100644
--- a/agent/bedrock_adapter.py
+++ b/agent/bedrock_adapter.py
@@ -1297,6 +1297,7 @@ def classify_bedrock_error(error_message: str) -> str:
 
 BEDROCK_CONTEXT_LENGTHS: Dict[str, int] = {
     # Anthropic Claude models on Bedrock
+    "anthropic.claude-sonnet-5":     1_000_000,
     "anthropic.claude-opus-4-6":     200_000,
     "anthropic.claude-sonnet-4-6":   200_000,
     "anthropic.claude-sonnet-4-5":   200_000,
diff --git a/agent/model_metadata.py b/agent/model_metadata.py
index 734febd3bf43..d2b36323bb0a 100644
--- a/agent/model_metadata.py
+++ b/agent/model_metadata.py
@@ -195,6 +195,7 @@ def _save_model_metadata_disk_cache(data: Dict[str, Dict[str, Any]]) -> None:
     # OpenRouter-prefixed models resolve via OpenRouter live API or models.dev.
     "claude-fable-5": 1000000,
     "claude-fable": 1000000,
+    "claude-sonnet-5": 1000000,
     "claude-opus-4-8": 1000000,
     "claude-opus-4.8": 1000000,
     "claude-opus-4-7": 1000000,
diff --git a/agent/reasoning_timeouts.py b/agent/reasoning_timeouts.py
index 9e0b5cab9b91..48b1bb7883de 100644
--- a/agent/reasoning_timeouts.py
+++ b/agent/reasoning_timeouts.py
@@ -98,6 +98,7 @@
     # ``claude-opus-4`` so non-thinking Claude 3.x or future
     # non-reasoning Claude variants don't match.
     ("claude-opus-4", 240),
+    ("claude-sonnet-5", 180),
     ("claude-sonnet-4.5", 180),
     ("claude-sonnet-4.6", 180),
     # xAI Grok reasoning variants.  Explicit reasoning-only keys
diff --git a/agent/usage_pricing.py b/agent/usage_pricing.py
index 7c4416e5fb25..b6b6b7bb0f52 100644
--- a/agent/usage_pricing.py
+++ b/agent/usage_pricing.py
@@ -165,6 +165,18 @@ class CostResult:
         source_url="https://platform.claude.com/docs/en/about-claude/pricing",
         pricing_version="anthropic-pricing-2026-05",
     ),
+    (
+        "anthropic",
+        "claude-sonnet-5",
+    ): PricingEntry(
+        input_cost_per_million=Decimal("3.00"),
+        output_cost_per_million=Decimal("15.00"),
+        cache_read_cost_per_million=Decimal("0.30"),
+        cache_write_cost_per_million=Decimal("3.75"),
+        source="official_docs_snapshot",
+        source_url="https://platform.claude.com/docs/en/about-claude/pricing",
+        pricing_version="anthropic-pricing-2026-06",
+    ),
     (
         "anthropic",
         "claude-sonnet-4-6",
@@ -457,6 +469,18 @@ class CostResult:
         source_url="https://aws.amazon.com/bedrock/pricing/",
         pricing_version="bedrock-pricing-2026-04",
     ),
+    (
+        "bedrock",
+        "anthropic.claude-sonnet-5",
+    ): PricingEntry(
+        input_cost_per_million=Decimal("3.00"),
+        output_cost_per_million=Decimal("15.00"),
+        cache_read_cost_per_million=Decimal("0.30"),
+        cache_write_cost_per_million=Decimal("3.75"),
+        source="official_docs_snapshot",
+        source_url="https://aws.amazon.com/bedrock/pricing/",
+        pricing_version="bedrock-pricing-2026-06",
+    ),
     (
         "bedrock",
         "anthropic.claude-sonnet-4-6",
diff --git a/hermes_cli/models.py b/hermes_cli/models.py
index cf3eb40edaaf..da5dd2ae7d9b 100644
--- a/hermes_cli/models.py
+++ b/hermes_cli/models.py
@@ -36,6 +36,7 @@
     # Anthropic
     ("anthropic/claude-opus-4.8",              ""),
     ("anthropic/claude-opus-4.8-fast",         "2x price, higher output speed"),
+    ("anthropic/claude-sonnet-5",              ""),
     ("anthropic/claude-sonnet-4.6",            ""),
     ("anthropic/claude-haiku-4.5",             ""),
     # OpenAI
@@ -177,6 +178,7 @@ def _xai_curated_models() -> list[str]:
     "nous": [
         # Anthropic
         "anthropic/claude-opus-4.8",
+        "anthropic/claude-sonnet-5",
         "anthropic/claude-sonnet-4.6",
         "anthropic/claude-haiku-4.5",
         # OpenAI
@@ -340,6 +342,7 @@ def _xai_curated_models() -> list[str]:
     ],
     "anthropic": [
         "claude-fable-5",
+        "claude-sonnet-5",
         "claude-opus-4-8",
         "claude-opus-4-7",
         "claude-opus-4-6",
@@ -376,6 +379,7 @@ def _xai_curated_models() -> list[str]:
         "deepseek-ai/DeepSeek-V3.2",
         "moonshotai/Kimi-K2.5",
         "google/gemini-3.1-flash-lite-preview",
+        "anthropic/claude-sonnet-5",
         "anthropic/claude-sonnet-4.6",
         "openai/gpt-5.4",
     ],
@@ -400,6 +404,7 @@ def _xai_curated_models() -> list[str]:
         "gpt-5-codex",
         "gpt-5-nano",
         "claude-fable-5",
+        "claude-sonnet-5",
         "claude-opus-4-8",
         "claude-opus-4-7",
         "claude-opus-4-6",
@@ -498,6 +503,7 @@ def _xai_curated_models() -> list[str]:
     # prefers live discovery via ListFoundationModels + ListInferenceProfiles.
     # Use inference profile IDs (us.*) since most models require them.
     "bedrock": [
+        "us.anthropic.claude-sonnet-5",
         "us.anthropic.claude-sonnet-4-6",
         "us.anthropic.claude-opus-4-6-v1",
         "us.anthropic.claude-haiku-4-5-20251001-v1:0",
@@ -3153,6 +3159,7 @@ def _fetch_github_models(api_key: Optional[str] = None, timeout: float = 5.0) ->
     "openai/o3-mini": "gpt-5-mini",
     "openai/o4-mini": "gpt-5-mini",
     "anthropic/claude-opus-4.6": "claude-opus-4.6",
+    "anthropic/claude-sonnet-5": "claude-sonnet-5",
     "anthropic/claude-sonnet-4.6": "claude-sonnet-4.6",
     "anthropic/claude-sonnet-4": "claude-sonnet-4",
     "anthropic/claude-sonnet-4.5": "claude-sonnet-4.5",
@@ -3162,12 +3169,14 @@ def _fetch_github_models(api_key: Optional[str] = None, timeout: float = 5.0) ->
     # dot-notation.  Accept both so users who configure copilot + a
     # default hyphenated Claude model don't hit HTTP 400
     # "model_not_supported".  See issue #6879.
+    "claude-sonnet-5": "claude-sonnet-5",
     "claude-opus-4-6": "claude-opus-4.6",
     "claude-sonnet-4-6": "claude-sonnet-4.6",
     "claude-sonnet-4-0": "claude-sonnet-4",
     "claude-sonnet-4-5": "claude-sonnet-4.5",
     "claude-haiku-4-5": "claude-haiku-4.5",
     "anthropic/claude-opus-4-6": "claude-opus-4.6",
+    "anthropic/claude-sonnet-5": "claude-sonnet-5",
     "anthropic/claude-sonnet-4-6": "claude-sonnet-4.6",
     "anthropic/claude-sonnet-4-0": "claude-sonnet-4",
     "anthropic/claude-sonnet-4-5": "claude-sonnet-4.5",
diff --git a/hermes_cli/setup.py b/hermes_cli/setup.py
index a178c0b5ca9e..aade677027be 100644
--- a/hermes_cli/setup.py
+++ b/hermes_cli/setup.py
@@ -84,6 +84,7 @@ def _supports_same_provider_pool_setup(provider: str) -> bool:
         "gpt-4o",
         "gpt-4o-mini",
         "claude-opus-4.6",
+        "claude-sonnet-5",
         "claude-sonnet-4.6",
         "claude-sonnet-4.5",
         "claude-haiku-4.5",
@@ -100,8 +101,8 @@ def _supports_same_provider_pool_setup(provider: str) -> bool:
     "arcee": ["trinity-large-thinking", "trinity-large-preview", "trinity-mini"],
     "minimax": ["MiniMax-M2.7", "MiniMax-M2.5", "MiniMax-M2.1", "MiniMax-M2"],
     "minimax-cn": ["MiniMax-M2.7", "MiniMax-M2.5", "MiniMax-M2.1", "MiniMax-M2"],
-    "kilocode": ["anthropic/claude-opus-4.6", "anthropic/claude-sonnet-4.6", "openai/gpt-5.4", "google/gemini-3-pro-preview", "google/gemini-3-flash-preview"],
-    "opencode-zen": ["gpt-5.4", "gpt-5.3-codex", "claude-sonnet-4-6", "gemini-3-flash", "glm-5", "kimi-k2.5", "minimax-m2.7"],
+    "kilocode": ["anthropic/claude-sonnet-5", "anthropic/claude-opus-4.6", "anthropic/claude-sonnet-4.6", "openai/gpt-5.4", "google/gemini-3-pro-preview", "google/gemini-3-flash-preview"],
+    "opencode-zen": ["gpt-5.4", "gpt-5.3-codex", "claude-sonnet-5", "claude-sonnet-4-6", "gemini-3-flash", "glm-5", "kimi-k2.5", "minimax-m2.7"],
     "opencode-go": ["kimi-k2.6", "kimi-k2.5", "glm-5.1", "glm-5", "mimo-v2.5-pro", "mimo-v2.5", "mimo-v2-pro", "mimo-v2-omni", "minimax-m2.7", "minimax-m2.5", "qwen3.7-max", "qwen3.6-plus", "qwen3.5-plus"],
     "huggingface": [
         "Qwen/Qwen3.5-397B-A17B", "Qwen/Qwen3-235B-A22B-Thinking-2507",
diff --git a/tests/agent/test_minimax_provider.py b/tests/agent/test_minimax_provider.py
index 2dd1510786e7..1152514c1e52 100644
--- a/tests/agent/test_minimax_provider.py
+++ b/tests/agent/test_minimax_provider.py
@@ -330,6 +330,7 @@ def test_claude_output_unaffected(self):
         from agent.anthropic_adapter import _get_anthropic_max_output
         # Sanity: Claude limits are not broken by the MiniMax entry
         assert _get_anthropic_max_output("claude-sonnet-4-6") == 64_000
+        assert _get_anthropic_max_output("claude-sonnet-5") == 128_000
 
 
 class TestMinimaxPreserveDots:
diff --git a/tests/hermes_cli/test_anthropic_picker_curated.py b/tests/hermes_cli/test_anthropic_picker_curated.py
index 407bb362b1f2..6465a87396a0 100644
--- a/tests/hermes_cli/test_anthropic_picker_curated.py
+++ b/tests/hermes_cli/test_anthropic_picker_curated.py
@@ -20,6 +20,7 @@ def test_anthropic_curated_alias_survives_when_live_omits_it():
     """A curated alias missing from /v1/models still surfaces (first)."""
     curated = M._PROVIDER_MODELS["anthropic"]
     assert "claude-fable-5" in curated  # sanity: the alias is curated
+    assert "claude-sonnet-5" in curated  # newest Sonnet alias is curated
 
     # Live catalog the API would actually return — no fable-5.
     live = ["claude-opus-4-8", "claude-sonnet-4-6", "claude-haiku-4-5-20251001"]
@@ -27,6 +28,7 @@ def test_anthropic_curated_alias_survives_when_live_omits_it():
         result = M.provider_model_ids("anthropic")
 
     assert "claude-fable-5" in result
+    assert "claude-sonnet-5" in result
     # Curated order is preserved at the front.
     assert result[:len(curated)] == list(curated)