diff --git a/changelog.d/fixes/6998-opencode-oc-free-tier-catalog.md b/changelog.d/fixes/6998-opencode-oc-free-tier-catalog.md
new file mode 100644
index 0000000000..e5a3f5189b
--- /dev/null
+++ b/changelog.d/fixes/6998-opencode-oc-free-tier-catalog.md
@@ -0,0 +1 @@
+- fix(providers): refresh OpenCode (`oc`) free-tier model catalog — 6 delisted IDs replaced with the 4 currently-live free models (#6998)
diff --git a/open-sse/config/providers/registry/opencode/index.ts b/open-sse/config/providers/registry/opencode/index.ts
index 5f3779d72a..4aaa6ea046 100644
--- a/open-sse/config/providers/registry/opencode/index.ts
+++ b/open-sse/config/providers/registry/opencode/index.ts
@@ -23,29 +23,15 @@ export const opencodeProvider: RegistryEntry = {
       interleavedField: "reasoning_content",
     },
     { id: "deepseek-v4-flash-free", name: "DeepSeek V4 Flash Free", supportsReasoning: true },
-    // #3110: MiniMax M3 free tier via OpenCode
-    // #3328: MiniMax M3 is multimodal (verified: describes base64 images via the
-    // opencode upstream) — flag it so vision requests aren't gated/stripped.
-    {
-      id: "minimax-m3-free",
-      name: "MiniMax M3 Free",
-      contextLength: 1048576,
-      supportsVision: true,
-    },
-    { id: "minimax-m2.5-free", name: "MiniMax M2.5 Free", contextLength: 204800 },
-    { id: "ling-2.6-1t-free", name: "Ling 2.6 Free", contextLength: 262000 },
-    {
-      id: "trinity-large-preview-free",
-      name: "Trinity Large Preview Free",
-      contextLength: 131000,
-    },
-    { id: "nemotron-3-super-free", name: "Nemotron 3 Super Free", contextLength: 1000000 },
-    {
-      id: "qwen3.6-plus-free",
-      name: "Qwen3.6 Plus Free",
-      targetFormat: "claude",
-      supportsVision: false,
-      contextLength: 200000,
-    },
+    // #6998: 2026-07-14 refresh — the upstream free tier rotated its lineup;
+    // minimax-m3-free, minimax-m2.5-free, ling-2.6-1t-free,
+    // trinity-large-preview-free, nemotron-3-super-free and qwen3.6-plus-free
+    // were delisted (401 "Model X is not supported") and replaced by the 4
+    // entries below, confirmed live against
+    // https://opencode.ai/zen/v1/chat/completions.
+    { id: "mimo-v2.5-free", name: "MiMo V2.5 Free", contextLength: 131000 },
+    { id: "hy3-free", name: "HY3 Free", contextLength: 131000 },
+    { id: "nemotron-3-ultra-free", name: "Nemotron 3 Ultra Free", contextLength: 1000000 },
+    { id: "north-mini-code-free", name: "North Mini Code Free", contextLength: 131000 },
   ],
 };
diff --git a/tests/unit/minimax-m3-model-registry.test.ts b/tests/unit/minimax-m3-model-registry.test.ts
index 820cbc77ca..2aae2b3a69 100644
--- a/tests/unit/minimax-m3-model-registry.test.ts
+++ b/tests/unit/minimax-m3-model-registry.test.ts
@@ -29,13 +29,11 @@ describe("MiniMax M3 model registration (#3110)", () => {
     assert.equal(m3.contextLength, 1_048_576);
   });
 
-  it("opencode provider has minimax-m3-free with 1M context", () => {
+  it("opencode provider does NOT list minimax-m3-free (#6998 — delisted upstream, 401)", () => {
     const entry = REGISTRY.opencode;
     assert.ok(entry, "opencode registry entry must exist");
     const m3 = entry.models.find((m) => m.id === "minimax-m3-free");
-    assert.ok(m3, "minimax-m3-free must be in opencode models");
-    assert.equal(m3.name, "MiniMax M3 Free");
-    assert.equal(m3.contextLength, 1_048_576);
+    assert.equal(m3, undefined, "minimax-m3-free was delisted from OpenCode Zen's free tier (#6998)");
   });
 
   it("opencode-go provider has minimax-m3 with Claude targetFormat", () => {
diff --git a/tests/unit/opencode-free-tier-catalog-stale-6998.test.ts b/tests/unit/opencode-free-tier-catalog-stale-6998.test.ts
new file mode 100644
index 0000000000..c1d3eeae09
--- /dev/null
+++ b/tests/unit/opencode-free-tier-catalog-stale-6998.test.ts
@@ -0,0 +1,40 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+const { opencodeProvider } = await import(
+  "../../open-sse/config/providers/registry/opencode/index.ts"
+);
+
+function modelIds(): string[] {
+  return (opencodeProvider.models ?? []).map((m) => m.id);
+}
+
+const DELISTED_FREE_MODELS = [
+  "minimax-m3-free",
+  "minimax-m2.5-free",
+  "ling-2.6-1t-free",
+  "trinity-large-preview-free",
+  "nemotron-3-super-free",
+  "qwen3.6-plus-free",
+];
+
+const LIVE_FREE_MODELS_MISSING_FROM_CATALOG = [
+  "mimo-v2.5-free",
+  "hy3-free",
+  "nemotron-3-ultra-free",
+  "north-mini-code-free",
+];
+
+test("issue #6998: oc registry does not advertise delisted free-tier models", () => {
+  const ids = modelIds();
+  for (const delisted of DELISTED_FREE_MODELS) {
+    assert.ok(!ids.includes(delisted), `oc registry still advertises delisted upstream model "${delisted}"`);
+  }
+});
+
+test("issue #6998: oc registry advertises the current live free-tier models", () => {
+  const ids = modelIds();
+  for (const live of LIVE_FREE_MODELS_MISSING_FROM_CATALOG) {
+    assert.ok(ids.includes(live), `oc registry is missing live upstream free-tier model "${live}"`);
+  }
+});
diff --git a/tests/unit/provider-registry-qwen-vision.test.ts b/tests/unit/provider-registry-qwen-vision.test.ts
index 9382027aed..1b2ddaa3f2 100644
--- a/tests/unit/provider-registry-qwen-vision.test.ts
+++ b/tests/unit/provider-registry-qwen-vision.test.ts
@@ -63,16 +63,17 @@ test("#2822 opencode-go/qwen3.6-plus deve ter supportsVision !== true", () => {
   );
 });
 
-// #3328 — o oposto do #2822: MiniMax M3 (opencode) É multimodal (verificado
-// empiricamente: descreve imagens base64 via o upstream opencode). Deve ter
-// supportsVision: true para não ser barrado/strippado em requests com imagem.
-test("#3328 opencode/minimax-m3-free deve ter supportsVision: true", () => {
+// #3328 — o oposto do #2822: MiniMax M3 (opencode) era multimodal (verificado
+// empiricamente: descrevia imagens base64 via o upstream opencode). #6998:
+// minimax-m3-free foi deslistado do free tier da OpenCode Zen (401 "not
+// supported") em 2026-07-14 e removido do catálogo estático — este teste
+// agora confirma a remoção.
+test("#6998 opencode/minimax-m3-free não deve mais estar registrado (deslistado upstream)", () => {
   const model = getModel("opencode", "minimax-m3-free");
-  assert.ok(model, "minimax-m3-free deve estar registrado em opencode");
-  assert.strictEqual(
-    model.supportsVision,
-    true,
-    "opencode/minimax-m3-free é multimodal — supportsVision deve ser true"
+  assert.equal(
+    model,
+    undefined,
+    "opencode/minimax-m3-free foi deslistado do free tier da OpenCode Zen (#6998)"
   );
 });