diff --git a/.factory/README.md b/.factory/README.md
index 6fb3a42..dcc87c2 100644
--- a/.factory/README.md
+++ b/.factory/README.md
@@ -81,6 +81,9 @@ with `.factory/oracles/<n>.json` in one commit. From then on:
 
 The workflows stay inert until the repository variable `FACTORY_ENABLED` is `true`; they also
 need the Claude GitHub App and a secret (header of `factory-plan.yml`).
+They run Claude Code on Opus 5.5 at high effort (`--model claude-opus-5-5 --effort high` in
+`claude_args`). With `CLAUDE_CODE_OAUTH_TOKEN` they use the account's Claude subscription, so
+each run counts against the same usage limits as interactive sessions.
 
 `master` is the default branch, so `factory-plan.yml` and `factory-build.yml` must be
 identical on `dev` and `master`: issue-label events run the default branch's copy, and the
diff --git a/.github/workflows/factory-build.yml b/.github/workflows/factory-build.yml
index 8875d7a..55bb39b 100644
--- a/.github/workflows/factory-build.yml
+++ b/.github/workflows/factory-build.yml
@@ -70,7 +70,7 @@ jobs:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           prompt: /factory-build ${{ steps.gate.outputs.issue }}
-          claude_args: --max-turns 200 --allowedTools Bash,Read,Edit,Write,MultiEdit,Glob,Grep,Task,Skill
+          claude_args: --model claude-opus-5-5 --effort high --max-turns 200 --allowedTools Bash,Read,Edit,Write,MultiEdit,Glob,Grep,Task,Skill
       - name: Check the station ran
         if: steps.gate.outputs.issue
         env:
diff --git a/.github/workflows/factory-plan.yml b/.github/workflows/factory-plan.yml
index 7b15847..d1dd688 100644
--- a/.github/workflows/factory-plan.yml
+++ b/.github/workflows/factory-plan.yml
@@ -70,7 +70,7 @@ jobs:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
           prompt: /factory-plan ${{ steps.pick.outputs.issue }}
-          claude_args: --max-turns 80 --allowedTools Bash,Read,Edit,Write,MultiEdit,Glob,Grep,Task,Skill
+          claude_args: --model claude-opus-5-5 --effort high --max-turns 80 --allowedTools Bash,Read,Edit,Write,MultiEdit,Glob,Grep,Task,Skill
       - name: Check the station ran
         if: steps.pick.outputs.issue
         env: