claude-code - 💡(How to fix) Fix [BUG] v2.1.111 with Opus 4.7 consumes ~1.7–2x more context tokens than v2.1.110 on a fresh session [3 comments, 2 participants]

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/dzianissheka/.local/share/claude/versions/2.1.111 (expected in multi-process scenarios)\n at Kd_ (/$bunfs/root/src/entrypoints/cli.js:2748:2177)\n at qe6 (/$bunfs/root/src/entrypoints/cli.js:2748:1257)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-16T18:20:34.729Z"},{"error":"Error: Claude Code web sessions require authentication with a Claude.ai account. API key authentication is not sufficient. Please run /login to authenticate, or check your authentication status with /status.\n at rD (/$bunfs/root/src/entrypoints/cli.js:2628:1328)\n at ac1 (/$bunfs/root/src/entrypoints/cli.js:3084:14570)\n at Se9 (/$bunfs/root/src/entrypoints/cli.js:3084:15206)\n at Iw5 (/$bunfs/root/src/entrypoints/cli.js:5452:14243)\n at xw5 (/$bunfs/root/src/entrypoints/cli.js:5452:14320)\n at f (/$bunfs/root/src/entrypoints/cli.js:477:26078)\n at useState (/$bunfs/root/src/entrypoints/cli.js:477:104955)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:467:9336)\n at ia (/$bunfs/root/src/entrypoints/cli.js:5452:14280)\n at KV7 (/$bunfs/root/src/entrypoints/cli.js:6257:26313)\n at async <anonymous> (/$bunfs/root/src/entrypoints/cli.js:18148:2451)","timestamp":"2026-04-16T18:20:34.792Z"},{"error":"Error: Claude Code web sessions require authentication with a Claude.ai account. API key authentication is not sufficient. Please run /login to authenticate, or check your authentication status with /status.\n at rD (/$bunfs/root/src/entrypoints/cli.js:2628:1328)\n at ac1 (/$bunfs/root/src/entrypoints/cli.js:3084:14570)\n at Se9 (/$bunfs/root/src/entrypoints/cli.js:3084:15206)\n at Iw5 (/$bunfs/root/src/entrypoints/cli.js:5452:14243)\n at xw5 (/$bunfs/root/src/entrypoints/cli.js:5452:14320)\n at f (/$bunfs/root/src/entrypoints/cli.js:477:26078)\n at useState (/$bunfs/root/src/entrypoints/cli.js:477:104955)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:467:9336)\n at ia (/$bunfs/root/src/entrypoints/cli.js:5452:14280)\n at ay7 (/$bunfs/root/src/entrypoints/cli.js:6257:18467)\n at async <anonymous> (/$bunfs/root/src/entrypoints/cli.js:18148:2451)","timestamp":"2026-04-16T18:20:34.792Z"}]

TL;DR

The most likely fix is to investigate and potentially revert changes in the system prompt and system tools in Claude Code version 2.1.111, as these components show a significant increase in token usage compared to version 2.1.110.

Guidance

1. Review System Prompt and Tools: Investigate the changes made to the system prompt and system tools between versions 2.1.110 and 2.1.111, as these are the primary contributors to the increased token usage.
2. Compare Configuration: Although the configuration, including plugins and custom agents, was the same for both measurements, double-check for any subtle differences that might affect token usage.
3. Test with Minimal Configuration: Run the test with a minimal configuration (without plugins and custom agents) to isolate if the issue is related to the base system or the added components.
4. Check for Updates or Fixes: Look for any updates or patches for version 2.1.111 that might address the increased token usage issue.

Example

No specific code changes can be suggested without more details on the internal implementation of Claude Code. However, if the issue is identified in a specific part of the system prompt or tools, adjustments to those areas might be necessary.

Notes

The provided error messages do not directly relate to the token usage issue but indicate authentication and potential multi-process scenario problems. These should be addressed separately to ensure a clean testing environment.

Recommendation

Apply a workaround by potentially downgrading to version 2.1.110 if the increased token usage significantly impacts performance or cost, until the root cause is identified and fixed in version 2.1.111.