diff --git a/extensions/levelcode-ai/providers/catalog.js b/extensions/levelcode-ai/providers/catalog.js
index af2af3c..dc31580 100644
--- a/extensions/levelcode-ai/providers/catalog.js
+++ b/extensions/levelcode-ai/providers/catalog.js
@@ -29,9 +29,19 @@ const CAPS = {
 	'claude-opus-4-8':           { context: 200000, tools: true, vision: true, caching: true },
 	'claude-sonnet-4-6':         { context: 200000, tools: true, vision: true, caching: true },
 	'claude-haiku-4-5-20251001': { context: 200000, tools: true, vision: true, fast: true },
+	// Fable reaches the composer two ways: through the gateway as the OpenRouter basename (dotted
+	// 5.1), and BYOK-native as the dashed id. Neither had a row, so both fell to the claude-*
+	// heuristic's 200k — a fifth of the real window. Fable 5 / 5.1 are Pro-tier from 2026-09-08.
+	'claude-fable-5':   { context: 1000000, tools: true, vision: true, caching: true },
+	'claude-fable-5.1': { context: 1000000, tools: true, vision: true, caching: true },
+	'claude-fable-5-1': { context: 1000000, tools: true, vision: true, caching: true },
 	// OpenAI
 	'gpt-4o':      { context: 128000, tools: true, vision: true },
 	'gpt-4o-mini': { context: 128000, tools: true, vision: true, fast: true },
+	// Not covered by the gpt-4/gpt-5 heuristic below, which would also give it a 128k window; the
+	// real one is 1.05M (OpenRouter models API, 2026-09-06) and it reads images. Without this row the
+	// gateway picker offers it while the composer refuses attachments and the meter sizes it wrong.
+	'gpt-6-astra': { context: 1050000, tools: true, vision: true },
 	'o3-mini':     { context: 200000, tools: true, reasoning: true },
 	'o1':          { context: 200000, tools: true, reasoning: true },
 	'o1-mini':     { context: 128000, tools: false, reasoning: true },   // o1-mini has no function calling
diff --git a/extensions/levelcode-ai/test/catalog.test.js b/extensions/levelcode-ai/test/catalog.test.js
index 30aaefd..a68019a 100644
--- a/extensions/levelcode-ai/test/catalog.test.js
+++ b/extensions/levelcode-ai/test/catalog.test.js
@@ -19,6 +19,20 @@ test('modelCaps: exact table hit', () => {
 test('modelCaps: OpenRouter vendor/model matches on basename', () => {
 	assert.deepStrictEqual(C.modelCaps('openai/gpt-4o'), C.modelCaps('gpt-4o'));
 });
+// GPT-6 Astra is a gateway model; the picker offers whatever /account/models returns, so the caps
+// table must already know it or the composer refuses images and the meter assumes a 200k window.
+test('modelCaps: gpt-6-astra is an explicit row, not the gpt-4/5 heuristic', () => {
+	assert.deepStrictEqual(C.modelCaps('gpt-6-astra'), { context: 1050000, tools: true, vision: true });
+	assert.deepStrictEqual(C.modelCaps('openai/gpt-6-astra'), C.modelCaps('gpt-6-astra'));
+	assert.strictEqual(C.supportsVisionForModel('openai', 'gpt-6-astra'), true);
+	assert.strictEqual(C.contextWindowFor('openai', 'gpt-6-astra'), 1050000);
+});
+test('modelCaps: Fable 5 / 5.1 carry the 1M window under every id they arrive as', () => {
+	for (const id of ['anthropic/claude-fable-5', 'anthropic/claude-fable-5.1', 'claude-fable-5-1']) {
+		assert.deepStrictEqual(C.modelCaps(id), { context: 1000000, tools: true, vision: true, caching: true }, id);
+		assert.strictEqual(C.contextWindowFor('openai', id), 1000000, id);
+	}
+});
 test('modelCaps: family heuristics for unknown ids', () => {
 	assert.strictEqual(C.modelCaps('o4-mini').reasoning, true);       // o-series
 	assert.strictEqual(C.modelCaps('claude-3-5-haiku-latest').vision, true);