diff --git a/providers/byesu/logo.svg b/providers/byesu/logo.svg
new file mode 100644
index 0000000000..301abab436
--- /dev/null
+++ b/providers/byesu/logo.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor">
+  <rect x="5.9" y="5.7" width="2.7" height="7.6" rx="1.35" transform="rotate(-6 7.25 9.5)"/>
+  <rect x="14.0" y="3.6" width="2.9" height="9.0" rx="1.45" transform="rotate(13 15.45 8.1)"/>
+  <path d="M10.3 14.1c0-.5.55-.8.97-.52l3.0 2.0c.42.28.42.9 0 1.18l-3.0 2.0c-.42.28-.97-.02-.97-.52z"/>
+</svg>
diff --git a/providers/byesu/models/claude-opus-4-8.toml b/providers/byesu/models/claude-opus-4-8.toml
new file mode 100644
index 0000000000..207a1835af
--- /dev/null
+++ b/providers/byesu/models/claude-opus-4-8.toml
@@ -0,0 +1,5 @@
+base_model = "anthropic/claude-opus-4-8"
+
+[[reasoning_options]]
+type = "effort"
+values = ["low", "medium", "high", "xhigh", "max"]
diff --git a/providers/byesu/models/claude-sonnet-5.toml b/providers/byesu/models/claude-sonnet-5.toml
new file mode 100644
index 0000000000..af541012d8
--- /dev/null
+++ b/providers/byesu/models/claude-sonnet-5.toml
@@ -0,0 +1,6 @@
+base_model = "anthropic/claude-sonnet-5"
+structured_output = true
+
+[[reasoning_options]]
+type = "effort"
+values = ["low", "medium", "high", "xhigh", "max"]
diff --git a/providers/byesu/models/gemini-3.1-pro.toml b/providers/byesu/models/gemini-3.1-pro.toml
new file mode 100644
index 0000000000..19035b8918
--- /dev/null
+++ b/providers/byesu/models/gemini-3.1-pro.toml
@@ -0,0 +1,8 @@
+# Served on Byesu under the stable id `gemini-3.1-pro`; the upstream catalog
+# entry for this model is google/gemini-3.1-pro-preview.
+base_model = "google/gemini-3.1-pro-preview"
+name = "Gemini 3.1 Pro"
+
+[[reasoning_options]]
+type = "effort"
+values = ["low", "medium", "high"]
diff --git a/providers/byesu/models/gpt-5.5.toml b/providers/byesu/models/gpt-5.5.toml
new file mode 100644
index 0000000000..28509d7d42
--- /dev/null
+++ b/providers/byesu/models/gpt-5.5.toml
@@ -0,0 +1,5 @@
+base_model = "openai/gpt-5.5"
+
+[[reasoning_options]]
+type = "effort"
+values = ["none", "low", "medium", "high", "xhigh"]
diff --git a/providers/byesu/models/gpt-5.6-luna.toml b/providers/byesu/models/gpt-5.6-luna.toml
new file mode 100644
index 0000000000..7320e33282
--- /dev/null
+++ b/providers/byesu/models/gpt-5.6-luna.toml
@@ -0,0 +1,5 @@
+base_model = "openai/gpt-5.6-luna"
+
+[[reasoning_options]]
+type = "effort"
+values = ["none", "low", "medium", "high", "xhigh", "max"]
diff --git a/providers/byesu/models/gpt-5.6-sol.toml b/providers/byesu/models/gpt-5.6-sol.toml
new file mode 100644
index 0000000000..40e60dd644
--- /dev/null
+++ b/providers/byesu/models/gpt-5.6-sol.toml
@@ -0,0 +1,5 @@
+base_model = "openai/gpt-5.6-sol"
+
+[[reasoning_options]]
+type = "effort"
+values = ["none", "low", "medium", "high", "xhigh", "max"]
diff --git a/providers/byesu/models/gpt-5.6-terra.toml b/providers/byesu/models/gpt-5.6-terra.toml
new file mode 100644
index 0000000000..0323353802
--- /dev/null
+++ b/providers/byesu/models/gpt-5.6-terra.toml
@@ -0,0 +1,5 @@
+base_model = "openai/gpt-5.6-terra"
+
+[[reasoning_options]]
+type = "effort"
+values = ["none", "low", "medium", "high", "xhigh", "max"]
diff --git a/providers/byesu/models/grok-4.5.toml b/providers/byesu/models/grok-4.5.toml
new file mode 100644
index 0000000000..ecabd9416c
--- /dev/null
+++ b/providers/byesu/models/grok-4.5.toml
@@ -0,0 +1,5 @@
+base_model = "xai/grok-4.5"
+
+[[reasoning_options]]
+type = "effort"
+values = ["low", "medium", "high"]
diff --git a/providers/byesu/provider.toml b/providers/byesu/provider.toml
new file mode 100644
index 0000000000..0379068f47
--- /dev/null
+++ b/providers/byesu/provider.toml
@@ -0,0 +1,10 @@
+# Byesu is an AI API gateway offering official models with pay-as-you-go billing.
+# OpenAI-compatible Chat Completions: POST https://byesu.com/v1/chat/completions.
+# An Anthropic-native Messages API is also served from the same host:
+# POST https://byesu.com/v1/messages (same Bearer token).
+# https://docs.byesu.com/en/ (accessed 2026-07-11)
+name = "Byesu"
+env = ["BYESU_API_KEY"]
+npm = "@ai-sdk/openai-compatible"
+api = "https://byesu.com/v1"
+doc = "https://docs.byesu.com/en/"