diff --git a/scripts/claude-profile b/scripts/claude-profile
index 923a54a..12c954f 100755
--- a/scripts/claude-profile
+++ b/scripts/claude-profile
@@ -36,9 +36,10 @@ driver_model_id() {
     case "$1" in
         haiku)   echo "claude-haiku-4-5-20251001" ;;
         sonnet)  echo "claude-sonnet-4-6" ;;
-        opus)    echo "claude-opus-4-6" ;;
-        opus-1m) echo "claude-opus-4-6[1m]" ;;
-        *)       err "Unknown driver '$1'. Valid: haiku sonnet opus opus-1m" ;;
+        opus)    echo "claude-opus-4-8" ;;
+        opus-1m) echo "claude-opus-4-8[1m]" ;;
+        fable)   echo "claude-fable-5" ;;
+        *)       err "Unknown driver '$1'. Valid: haiku sonnet opus opus-1m fable" ;;
     esac
 }
 
diff --git a/specs/claude-profile.spec.md b/specs/claude-profile.spec.md
index 48ac863..3a63550 100644
--- a/specs/claude-profile.spec.md
+++ b/specs/claude-profile.spec.md
@@ -21,7 +21,7 @@ claude-profile [OPTIONS] [PROFILE] [-- CLAUDE_ARGS...]
 
 | Flag | Description |
 |------|-------------|
-| `--mode <NAME>` | Skip the mode picker and use the named mode (`chat`, `quick`, `deep`, `hybrid`, `orch`). |
+| `--mode <NAME>` | Skip the mode picker and use the named mode (`chat`, `quick`, `deep`, `deep-fable`, `hybrid`, `orch`). |
 | `--preset <NAME>` | Use a named preset from the active profile's `presets.yaml`. Sets profile, mode, and any preset-defined defaults in one shot. |
 | `--project <NAME>` | Pre-select a project (skips the project question for modes that ask it). |
 | `--dryrun`, `-n` | Print all resolved values and the command that would be executed; do not launch `claude`, do not write `active-mode.env` or `last-mode`. |
@@ -64,8 +64,9 @@ The model ID is determined by combining the mode's `driver` field with the profi
 |---|---|
 | `haiku` | `claude-haiku-4-5-20251001` |
 | `sonnet` | `claude-sonnet-4-6` |
-| `opus` | `claude-opus-4-6` |
-| `opus-1m` | `claude-opus-4-6[1m]` |
+| `opus` | `claude-opus-4-8` |
+| `opus-1m` | `claude-opus-4-8[1m]` (Opus 4.8 has 1M context natively; `opus-1m` is retained for the `[1m]` launch convention) |
+| `fable` | `claude-fable-5` |
 
 2. If `$CLAUDE_CONFIG_DIR/provider.env` exists, parse it. If it contains a `MODEL_ID` entry, use that instead of the hardcoded default.
 
@@ -95,7 +96,7 @@ YAML frontmatter (machine-readable) + markdown body (read by the driver model).
 ```yaml
 name: <short name, matches filename>
 tag: <status-line tag, ≤8 chars>
-driver: <haiku|sonnet|opus|opus-1m>
+driver: <haiku|sonnet|opus|opus-1m|fable>
 async_ok: <yes|no>
 autoloop: <none|"/loop 2m /orchestrate"|other slash command>
 plan_mode_auto: <yes|no>
diff --git a/tests/test-claude-profile.sh b/tests/test-claude-profile.sh
index 5e5a469..877a05f 100755
--- a/tests/test-claude-profile.sh
+++ b/tests/test-claude-profile.sh
@@ -177,6 +177,63 @@ rc=$?
 assert_exit_code "unknown flag exits 1" 1 "$rc"
 assert_contains "unknown flag error message" "Unknown flag" "$out"
 
+# === Test 13: deep-fable dryrun (deep-fable mode file lands in the next commit) ===
+echo
+echo "Test 13: deep-fable mode dryrun"
+out=$(run --dryrun oreillyit-anthropic --mode deep-fable)
+rc=$?
+assert_exit_code "deep-fable dryrun exits 0" 0 "$rc"
+assert_contains "deep-fable uses fable driver" "Driver:          fable" "$out"
+assert_contains "deep-fable shows fable model ID" "Model ID:        claude-fable-5" "$out"
+assert_contains "deep-fable shows model in exec command" "claude --model claude-fable-5" "$out"
+
+# === Test 14: error — unknown driver produces exit 1 ===
+echo
+echo "Test 14: error path — unknown driver"
+# Create a temporary mode file with an unknown driver in the actual modes dir,
+# run the test, then remove it immediately.
+baddriver_file="$REPO_ROOT/data/claude-profile/modes/_test-baddriver.md"
+cat > "$baddriver_file" <<'MEOF'
+---
+name: _test-baddriver
+tag: bad
+driver: notadriver
+async_ok: no
+autoloop: none
+plan_mode_auto: no
+spec_driven: no
+escalates_to: none
+---
+
+# Mode: Bad Driver Test
+## Purpose
+Temporary test fixture — do not use.
+## Driver constraint
+Unused.
+## Subagent policy
+Unused.
+## Reasoning posture
+Unused.
+## Async policy
+Unused.
+## Workflow stance
+Unused.
+## Auto-fire at session start
+none
+## Status line format
+none
+## Escalation triggers
+none
+## Out of scope
+none
+## On context wipe (/clear)
+none
+MEOF
+out=$(run --dryrun oreillyit-anthropic --mode _test-baddriver 2>&1); rc=$?
+rm -f "$baddriver_file"
+assert_exit_code "unknown driver exits 1" 1 "$rc"
+assert_contains "unknown driver error message" "Unknown driver" "$out"
+
 # === Summary ===
 echo
 echo "================================"