Use Anthropic Models in OpenCode with Your Claude Pro/Max Subscription

Use Claude models in OpenCode using your existing Claude Pro or Max subscription — no API key needed. This works by syncing the OAuth token from Claude Code (CLI) into OpenCode.

Prerequisites

• macOS, Linux or Windows
• OpenCode installed (desktop app or CLI)
• Claude Code (CLI) installed and logged in
• An active Claude Pro or Max subscription

Setup

1. Make sure Claude Code is logged in

claude auth status

You should see something like:

{
  "loggedIn": true,
  "authMethod": "claude.ai",
  "subscriptionType": "max"
}

If not logged in, run claude and follow the login flow.

2. Clone this repo

git clone https://github.com/9clg6/sync-claude-code-token-in-open-code.git
cd sync-claude-code-token-in-open-code
chmod +x sync-token.sh  # not needed on Windows

3. Run the sync script

macOS / Linux / Git Bash:

./sync-token.sh

Windows (PowerShell):

.\sync-token.ps1

Expected output:

Done! Anthropic token synced to OpenCode.
Expires: Fri Mar 20 05:22:36 CET 2026

4. Verify

# macOS desktop app:
/Applications/OpenCode.app/Contents/MacOS/opencode-cli providers list

# Or if installed via npm/homebrew:
opencode providers list

You should see:

●  Anthropic  oauth
└  1 credentials

5. Open OpenCode

Launch the OpenCode app. Anthropic models (Claude Sonnet, Opus, Haiku) should now appear in the model selector.

Token Renewal

The OAuth token expires approximately every 6 hours. You have two approaches to keep it fresh:

Manual Renewal

When Anthropic models stop working in OpenCode:

1. Use Claude Code in your terminal (any command) — this automatically refreshes the token
2. Run the sync script:

macOS / Linux / Git Bash:

./sync-token.sh

Windows (PowerShell):

.\sync-token.ps1

3. Restart OpenCode

Automated Renewal

Windows — sync-token-cron.ps1 (Recommended)

For a set-and-forget solution, use the sync-token-cron.ps1 automation loop:

powershell -ExecutionPolicy Bypass -File "sync-token-cron.ps1"

This script verifies you're logged in at startup, then checks the token before doing anything — Claude CLI is only started when a refresh is actually needed:

1. Pre-flight: Verifies Claude CLI is logged in (claude auth status) — exits with a clear error if not
2. Reads the current token expiry from ~/.claude/.credentials.json
3. If the token is still valid → skips refresh, syncs token to OpenCode, then sleeps
4. If a refresh is needed → starts Claude CLI briefly (~15s), exits it, runs sync-token.ps1
5. Sleeps until 30–90 minutes before expiry (randomized each cycle to avoid predictable patterns)
6. Loops back to step 2 automatically

Example output (startup + first refresh):

============================================
  Claude Token Refresh & Sync Loop
  Jitter range: 30-90 min before expiry
  Press Ctrl+C to stop
============================================

Checking Claude auth status...
Claude CLI is logged in.

========================================
[2026-03-21 14:00:00] Cycle #1
========================================
[2026-03-21 14:00:00] No valid token found. Refresh needed.
[2026-03-21 14:00:00] Starting Claude CLI to refresh token...
[2026-03-21 14:00:00] Claude CLI started (PID: 12345). Waiting for token refresh...
[2026-03-21 14:00:15] Stopping Claude CLI (PID: 12345)...
[2026-03-21 14:00:17] Claude CLI stopped.
[2026-03-21 14:00:17] Running token sync...
Done! Anthropic token synced to OpenCode.
[2026-03-21 14:00:18] Token sync completed.

[2026-03-21 14:00:18] Token expires:   2026-03-21 20:00:00
[2026-03-21 14:00:18] Jitter:          47 min before expiry
[2026-03-21 14:00:18] Wake up at:      2026-03-21 19:13:00
[2026-03-21 14:00:18] Sleeping for:    5h 12m

If Claude CLI is not logged in, the script exits immediately:

Checking Claude auth status...
ERROR: Claude CLI is not logged in. Run 'claude auth login' first.

Example output (subsequent cycle — token still valid):

========================================
[2026-03-21 19:13:00] Cycle #2
========================================
[2026-03-21 19:13:00] Token expires at 2026-03-21 20:00:00 — within 63min jitter window. Refresh needed.
[2026-03-21 19:13:00] Starting Claude CLI to refresh token...
...

If the script is restarted while the token is still fresh, it skips the refresh but still syncs:

========================================
[2026-03-21 15:30:00] Cycle #1
========================================
[2026-03-21 15:30:00] Token still valid (expires 2026-03-21 20:00:00, 4h 30m remaining). Skipping refresh, syncing token.
[2026-03-21 15:30:00] Running token sync...
Done! Anthropic token synced to OpenCode.
[2026-03-21 15:30:01] Token sync completed.

[2026-03-21 15:30:01] Token expires:   2026-03-21 20:00:00
[2026-03-21 15:30:01] Jitter:          52 min before expiry
[2026-03-21 15:30:01] Wake up at:      2026-03-21 19:08:00
[2026-03-21 15:30:01] Sleeping for:    3h 37m

Linux / macOS — Automate with cron (optional)

To automatically sync the token every 5 hours:

crontab -e

Add this line (replace the path with where you cloned the repo):

0 */5 * * * /path/to/sync-token.sh

Note: The cron job syncs the token but doesn't refresh it — Claude Code must have been used recently enough for the token to still be valid. If both tokens expire, open Claude Code once to trigger a refresh, then run the script. On Windows, sync-token-cron.ps1 handles both refresh and sync automatically.

How It Works

The script auto-detects your OS:

• macOS: first tries the macOS Keychain (multiple known Claude service names), then falls back to ~/.claude/.credentials.json
• Linux: reads the token from ~/.claude/.credentials.json (thanks @minivolk)
• Windows (untested — contributions welcome): reads the token from %USERPROFILE%\.claude\.credentials.json (use sync-token.ps1 for PowerShell, or sync-token.sh via Git Bash)

It then writes the token to ~/.local/share/opencode/auth.json in the OAuth format that OpenCode expects:

{
  "anthropic": {
    "type": "oauth",
    "access": "sk-ant-oat01-...",
    "refresh": "sk-ant-ort01-...",
    "expires": 1773980556114
  }
}

OpenCode recognizes Anthropic as an authenticated provider and exposes Claude models.

Troubleshooting

"No Claude Code credentials found in macOS Keychain or ~/.claude/.credentials.json" (macOS)

• Make sure Claude Code is installed and you've logged in at least once
• Run claude auth status to check

"~/.claude/.credentials.json not found" (Linux/Windows)

• Make sure Claude Code is installed and you've logged in at least once
• Run claude auth status to check

OpenCode doesn't show Anthropic models

• Run opencode providers list to verify the credential is detected
• Make sure the token hasn't expired — re-run ./sync-token.sh
• Restart OpenCode after syncing

Token expires too quickly

• The token lasts ~6 hours. Use sync-token-cron.ps1 on Windows for automatic refresh with randomized timing, cron on Linux/macOS, or re-run the script manually when needed

"sync-token-cron.ps1 falls back to 3h sleep"

• The credentials file couldn't be read or has no expiresAt field. Run claude auth status to verify Claude Code is logged in, then run the script once manually to confirm it works

OpenCode Desktop v1.2.27 Backup

Starting with OpenCode v1.3.0, Anthropic is no longer a built-in provider. A backup of v1.2.27 (the last version with Anthropic built-in) is available in the Releases section.