claude-code - 💡(How to fix) Fix [Bug] Claude 3.5 Opus performance regression: context loss and reduced rule compliance vs previous version [1 comments, 2 participants]

[{"error":"AxiosError: timeout of 5000ms exceeded\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:13291)\n at emit (node:events:92:22)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:3321)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-24T00:08:42.266Z"},{"error":"Error: Tool SendMessage not found\n at m57 (/$bunfs/root/src/entrypoints/cli.js:3093:31285)\n at qJ (/$bunfs/root/src/entrypoints/cli.js:478:21013)\n at $A (/$bunfs/root/src/entrypoints/cli.js:478:39566)\n at Wd (/$bunfs/root/src/entrypoints/cli.js:478:50271)\n at WRH (/$bunfs/root/src/entrypoints/cli.js:478:86947)\n at nFH (/$bunfs/root/src/entrypoints/cli.js:478:85908)\n at lFH (/$bunfs/root/src/entrypoints/cli.js:478:85729)\n at Rp (/$bunfs/root/src/entrypoints/cli.js:478:82083)\n at tH (/$bunfs/root/src/entrypoints/cli.js:478:6491)\n at NH (/$bunfs/root/src/entrypoints/cli.js:478:4977)","timestamp":"2026-04-24T00:10:05.413Z"},{"error":"Error: Tool SendMessage not found\n at m57 (/$bunfs/root/src/entrypoints/cli.js:3093:31285)\n at qJ (/$bunfs/root/src/entrypoints/cli.js:478:21013)\n at $A (/$bunfs/root/src/entrypoints/cli.js:478:39566)\n at Wd (/$bunfs/root/src/entrypoints/cli.js:478:50271)\n at WRH (/$bunfs/root/src/entrypoints/cli.js:478:86947)\n at nFH (/$bunfs/root/src/entrypoints/cli.js:478:85908)\n at lFH (/$bunfs/root/src/entrypoints/cli.js:478:85729)\n at Rp (/$bunfs/root/src/entrypoints/cli.js:478:82083)\n at tH (/$bunfs/root/src/entrypoints/cli.js:478:6491)\n at NH (/$bunfs/root/src/entrypoints/cli.js:478:4977)","timestamp":"2026-04-24T00:10:17.673Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:13291)\n at emit (node:events:92:22)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:3321)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-24T00:15:02.485Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:13291)\n at emit (node:events:92:22)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:3321)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-24T00:15:23.203Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:13291)\n at emit (node:events:92:22)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:3321)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-24T00:17:59.646Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:13291)\n at emit (node:events:92:22)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:3321)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-24T00:19:26.764Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:13291)\n at emit (node:events:92:22)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:3321)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-24T00:20:36.648Z"},{"error":"AxiosError: timeout of 5000ms exceeded\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:115:13291)\n at emit (node:events:92:22)\n at <anonymous> (/$bunfs/root/src/entrypoints/cli.js:114:3321)\n at request (/$bunfs/root/src/entrypoints/cli.js:117:2467)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-04-24T00:32:56.123Z"},{"error":"Error: File does not exist. Note: your current working directory is /Users/zio…

TL;DR

Reverting to Opus 4.6 may be the most viable workaround due to the severe underperformance and contextual issues experienced with Opus 4.7.

Guidance

• Review Error Logs: The provided error logs indicate repeated AxiosError: timeout of 5000ms exceeded and Error: Tool SendMessage not found errors, suggesting potential issues with network requests or tool availability.
• Check Tool Configuration: Ensure that the SendMessage tool is properly configured and accessible, as its absence is reported in several errors.
• Network Stability: Verify the stability and performance of the network connection, as repeated timeouts could indicate connectivity issues.
• Version Compatibility: Consider the compatibility of Opus 4.7 with the current environment and tools, as the downgrade to Opus 4.6 resolved the issue temporarily.

Example

No specific code snippet can be provided without more context on the custom implementation or integration with Opus. However, reviewing the entrypoints/cli.js file around the mentioned lines (e.g., 115, 114, 117) might offer insights into the request and error handling mechanisms.

Notes

The issue description lacks detailed technical specifications about the Opus versions, environment setup, and custom code integrations, making it challenging to provide a precise fix. The errors suggest a mix of network timeouts and tool configuration issues.

Recommendation

Apply the workaround of reverting to Opus 4.6, as it has been confirmed to work by the user, until a more comprehensive solution or update for Opus 4.7 is available that addresses the performance and contextual issues.