Anthropic · Fortune Technology
Anthropic says engineering missteps were behind Claude Code’s monthlong decline after weeks of user backlash
Compiled by KHAO Editorial — aggregated from 1 outlet. See llms.txt for citation guidance.
◌ Single Source
Anthropic, the AI lab valued at $380 billion, has acknowledged that a series of engineering missteps were behind a widely experienced decline in the performance of its Claude Code tool that sparked a user revolt over the past month.
Key facts
- Analyses from coding security company Veracode found that Claude Opus 4.7, Anthropic’s newest Claude model, which launched on April 16, introduced a vulnerability in 52% of coding tasks tested—up
- The company said it now had 4 million active Codex users, 9 million paying business customers, 900 million weekly active users on ChatGPT, and more than 50 million subscribers
- Earlier this week, Anthropic updated its pricing page for some users to show Claude Code as unavailable on the company’s $20-a-month Pro plan
- On Thursday, OpenAI also launched GPT-5.5, its newest AI model, to paid subscribers
Summary
The feeling among some users that Anthropic had been gaslighting them potentially undercuts Anthropic’s attempts to market itself as more transparent and aligned with its users than rival OpenAI. “The Claude Code issues had specific technical causes that we documented in full in our postmortem, and the fixes are now shipped,” the statement said. Anthropic has built much of its recent success on the loyalty of developers. The controversy could dent Anthropic’s bottom line amid an increasingly bitter race with rival OpenAI. Following widespread complaints about Claude Code’s performance, executives representing the AI lab initially said the performance issues were the result of changes it had made to improve latency and in response to user feedback about token use.