diff --git a/src/core/applicability.ts b/src/core/applicability.ts
index d734504..4b72b0b 100644
--- a/src/core/applicability.ts
+++ b/src/core/applicability.ts
@@ -29,12 +29,10 @@ let runtimeModelBases: readonly string[] | null = null;
  *  - Opus 4.7/4.8 — worse at reading imaged content (FINDINGS.md 2026-06-16:
  *    Opus 4.8 ~2pp arithmetic, 6/15 dense-hex vs Fable 100/100).
  *  - GPT 5.5 — degrades on imaged history/context.
- *  - GPT 5.6 Sol — direct raw-image calls at both its 6×11 profile and the
- *    old shared 5×8 profile scored 0/4 exact with four confabulations. Its
- *    exact model profile remains available for explicit opt-in and retuning.
- *  - Grok 4.5 — packing + factsheet works for exact IDs, but pure-image is
- *    not Fable-level and the full quality suite is incomplete. Opt-in only
- *    until multi-seed + novel arithmetic clear a Fable-class bar.
+ *  - GPT 5.6 Sol — 98/100 production arithmetic, but 79/93 completed gist,
+ *    4/15 completed guard confabulations, and 0/15 dense hex.
+ *  - Grok 4.5 — 82/100 arithmetic, 83/98 gist, and 13/18 state tracking.
+ *  Both profiles remain available for explicit opt-in.
  *  Silently imaging weak or unvalidated readers is the wrong default. */
 const DEFAULT_MODEL_BASES = ['claude-fable-5'];
 
diff --git a/src/core/gpt-model-profiles.ts b/src/core/gpt-model-profiles.ts
index 7743345..6ca6cd7 100644
--- a/src/core/gpt-model-profiles.ts
+++ b/src/core/gpt-model-profiles.ts
@@ -104,11 +104,11 @@ export const DEFAULT_GPT_PROFILE: GptModelProfile = {
 
 const GPT56_SOL_PROFILE: GptModelProfile = {
   vision: { regime: 'patch', multiplier: 1, patchCap: 10000 },
-  stripCols: 126,
+  // Native 5×8 cells fit 152 columns at OpenAI's 768px short-side floor.
+  // Sol remains opt-in because broader recall is below the Fable bar.
+  stripCols: C,
   maxHeightPx: H,
-  // Separate atlas selected by model id. Cell remains within OpenAI's 768px
-  // short-side floor (126 cols x 6px + padding = 764px).
-  style: { ...BASE_STYLE, font: 'jetbrains-mono-10' },
+  style: { ...BASE_STYLE, font: 'spleen-5x8' },
 };
 
 interface ProfileRule {
@@ -176,14 +176,8 @@ const BUILTIN_RULES: ProfileRule[] = [
     },
   },
 
-  // Grok (Responses path). Opt-in only (not Fable-level pure-image). Profile:
-  // Best stable pure-image recipe from brute force: stock Spleen 5×8, white AA,
-  // no grid, maxHeight 512, width 152 (768 short-side floor), plus an in-image
-  // IDS block is applied on every model path (appendIdsBlock); Grok still
-  // needs white AA + short pages. White+ids_block: 7/7 full 4/4 on grok-4.5
-  // pure-image (no factsheet).
-  // paperGray 240 without grid confabulates ports; grid alone does not fix hex.
-  // Fact-sheet remains optional defense in depth.
+  // Grok remains opt-in. It shares the 5×8 production stack but uses shorter
+  // pages because its dense-image recall falls with taller strips.
   {
     test: (m) => /^grok-/.test(m),
     profile: {
diff --git a/tests/design-behavior-e2e.test.ts b/tests/design-behavior-e2e.test.ts
index 4d9ed6f..5f078be 100644
--- a/tests/design-behavior-e2e.test.ts
+++ b/tests/design-behavior-e2e.test.ts
@@ -21,9 +21,7 @@
 import { afterAll, beforeAll, describe, expect, it } from 'vitest';
 import { createProxy } from '../src/core/proxy.js';
 
-// These proxy-contract tests deliberately exercise the opt-in Sol transform.
-// Snapshot the developer shell so the suite is deterministic now that Sol is
-// intentionally absent from the built-in default scope.
+// Pin the model scope so these proxy-contract tests stay independent of the developer shell.
 let ambientPxpipeModels: string | undefined;
 beforeAll(() => {
   ambientPxpipeModels = process.env.PXPIPE_MODELS;
diff --git a/tests/openai-gpt5.test.ts b/tests/openai-gpt5.test.ts
index 0ae4ee1..5a49f31 100644
--- a/tests/openai-gpt5.test.ts
+++ b/tests/openai-gpt5.test.ts
@@ -931,8 +931,8 @@ describe('resolveGptProfile (Claude on Responses)', () => {
     ]) {
       const sol = resolveGptProfile(model);
       expect(sol.maxHeightPx, model).toBe(1932);
-      expect(sol.stripCols, model).toBe(126);
-      expect(sol.style.font, model).toBe('jetbrains-mono-10');
+      expect(sol.stripCols, model).toBe(152);
+      expect(sol.style.font, model).toBe('spleen-5x8');
     }
     for (const model of ['gpt-5.6', 'gpt-5.6-terra', 'gpt-5.6-terra[1m]']) {
       const notSol = resolveGptProfile(model);
diff --git a/tests/public-api.test.ts b/tests/public-api.test.ts
index 87228a7..5602613 100644
--- a/tests/public-api.test.ts
+++ b/tests/public-api.test.ts
@@ -83,6 +83,7 @@ describe('public library API', () => {
       // null clears the override → back to the Fable-only default
       setAllowedModelBases(null);
       expect(isPxpipeSupportedModel('claude-fable-5')).toBe(true);
+      expect(isPxpipeSupportedGptModel('gpt-5.6-sol')).toBe(false);
       expect(isPxpipeSupportedGptModel('grok-4.5')).toBe(false);
       expect(isPxpipeSupportedModel('claude-opus-4-8')).toBe(false);
     } finally {
@@ -90,7 +91,7 @@ describe('public library API', () => {
     }
   });
 
-  it('keeps GPT 5.6 Sol off by default but preserves exact opt-in aliases', () => {
+  it('keeps GPT 5.6 Sol aliases opt-in by default', () => {
     expect(isPxpipeSupportedGptModel('gpt-5')).toBe(false);
     expect(isPxpipeSupportedGptModel('gpt-5.5')).toBe(false);
     expect(isPxpipeSupportedGptModel('gpt-5.5-codex')).toBe(false);
@@ -110,9 +111,9 @@ describe('public library API', () => {
     expect(isPxpipeSupportedGptModel('gpt-5.6-terra')).toBe(false);
   });
 
-  it('keeps Grok and Sol opt-in only (off by default, like Opus)', () => {
-    // Grok packing + factsheet helps exact IDs, but pure-image is not Fable-
-    // level and the full quality suite is incomplete — opt-in only.
+  it('keeps Grok and Sol opt-in by default', () => {
+    // Grok remains opt-in because its arithmetic, gist, and state results are
+    // below the Fable bar.
     const prev = process.env.PXPIPE_MODELS;
     try {
       delete process.env.PXPIPE_MODELS;
diff --git a/tests/savings-math-e2e.test.ts b/tests/savings-math-e2e.test.ts
index 2c0ae96..1d76373 100644
--- a/tests/savings-math-e2e.test.ts
+++ b/tests/savings-math-e2e.test.ts
@@ -23,8 +23,7 @@ import { afterAll, beforeAll, describe, expect, it } from 'vitest';
 import { createProxy, type ProxyEvent } from '../src/core/proxy.js';
 import { countTokens as o200k } from 'gpt-tokenizer/encoding/o200k_base';
 
-// The GPT tests below drive 'gpt-5.6-sol', which is intentionally absent from
-// the built-in default scope (Fable 5 + Grok 4.5). Pin PXPIPE_MODELS so the suite is
+// The GPT tests below drive exact Sol. Pin PXPIPE_MODELS so the suite is
 // deterministic regardless of the developer's shell (same convention as
 // proxy-usage.test.ts) — without this, the file passes or fails depending on
 // ambient env, which is exactly what broke CI.
@@ -162,10 +161,10 @@ describe('savings math — GPT, cross-checked against the real o200k tokenizer',
 
   it('DECLINES A LOSER: refuses to image content where imaging would cost more than the real text', async () => {
     // Dense long-line slab: few o200k text tokens relative to vision pages.
-    // (The old 2k prose fixture is now profitable under Sol 6×11 packing — ~216
-    // image vs ~500 text tokens — so it no longer exercises the decline path.)
+    // Use enough low-token-density alphabet runs to remain a loser under the denser
+    // Sol 5×8 packing; the gate must still reject it.
     const sys = Array.from({ length: 80 }, (_, i) =>
-      `LINE${i} ` + 'abcdefghijklmnopqrstuvwxyz'.repeat(20),
+      `LINE${i} ` + 'abcdefghijklmnopqrstuvwxyz'.repeat(40),
     ).join('\n');
     const realTok = o200k(sys);
     const body = JSON.stringify({