diff --git a/hermes_cli/models.py b/hermes_cli/models.py
index 3048bdb0dc..7edbff7b9b 100644
--- a/hermes_cli/models.py
+++ b/hermes_cli/models.py
@@ -559,12 +559,14 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
     # OpenCode free tier — keyless (no OpenCode account needed). Synced
     # against live GET /zen/v1/models + anonymous probes (2026-08-21);
     # deepseek-v4-flash-free delisted (promo ended, now 401s).
+    # big-pickle + mimo-v2.5-free delisted (UA-gated: the relay 429s
+    # FreeUsageLimitError for every client except User-Agent
+    # "opencode/latest"; we send honest Hermes attribution and don't
+    # impersonate other clients — verified 2026-08-21).
     "opencode-free": [
         "x-preview-f-free",  # "Ox Alpha" stealth model — free, 1M ctx, ZDR
-        "big-pickle",
         "hy3-free",
         "laguna-s-2.1-free",
-        "mimo-v2.5-free",
         "nemotron-3-ultra-free",
         "nemotron-3.5-lightning-free",
         "muse-spark-1.2-contributor-free",
diff --git a/hermes_cli/setup.py b/hermes_cli/setup.py
index 9beb2973fa..3d43d22eff 100644
--- a/hermes_cli/setup.py
+++ b/hermes_cli/setup.py
@@ -109,7 +109,7 @@ _DEFAULT_PROVIDER_MODELS = {
     "ai-gateway": ["anthropic/claude-opus-4.6", "anthropic/claude-sonnet-4.6", "openai/gpt-5", "google/gemini-3-flash"],
     "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": ["x-preview-f-free", "gpt-5.6-sol", "gpt-5.4", "gpt-5.3-codex", "claude-opus-5", "claude-sonnet-5", "gemini-3.7-flash", "glm-5.2", "kimi-k3", "minimax-m3"],
-    "opencode-free": ["x-preview-f-free", "big-pickle", "hy3-free", "laguna-s-2.1-free", "mimo-v2.5-free", "nemotron-3-ultra-free", "nemotron-3.5-lightning-free", "muse-spark-1.2-contributor-free"],
+    "opencode-free": ["x-preview-f-free", "hy3-free", "laguna-s-2.1-free", "nemotron-3-ultra-free", "nemotron-3.5-lightning-free", "muse-spark-1.2-contributor-free"],
     "opencode-go": ["kimi-k3", "kimi-k2.7-code", "kimi-k2.6", "gpt-5.6-luna", "grok-4.5", "glm-5.3", "glm-5.2", "mimo-v2.5-pro", "mimo-v2.5", "minimax-m3", "minimax-m2.7", "qwen3.8-max", "qwen3.7-max", "deepseek-v4-pro", "hy3"],
     "huggingface": [
         "Qwen/Qwen3.5-397B-A17B", "Qwen/Qwen3-235B-A22B-Thinking-2507",
diff --git a/plugins/model-providers/opencode-free/__init__.py b/plugins/model-providers/opencode-free/__init__.py
index 8ef88dcdf1..96d1970cc9 100644
--- a/plugins/model-providers/opencode-free/__init__.py
+++ b/plugins/model-providers/opencode-free/__init__.py
@@ -59,7 +59,9 @@ opencode_free = OpenCodeFreeProfile(
     display_name="OpenCode Free",
     description="OpenCode free models — keyless, no account needed",
     default_headers=dict(_KEYLESS_HEADERS),
-    default_aux_model="big-pickle",
+    # laguna is the fastest non-UA-gated free model; big-pickle 429s every
+    # client except the opencode CLI's own User-Agent (verified 2026-08-21).
+    default_aux_model="laguna-s-2.1-free",
 )
 
 register_provider(opencode_free)