Extended thinking option gone?
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Users of Claude Code, specifically with Opus 4.6 and 5, are reporting the disappearance of the "thinking block" and the "extended thinking toggle option." This feature, which provided a Chain of Thought (CoT), was highly valued for guiding Claude's direction and surfacing useful information not always present in the final answer. The absence of this functionality is causing concern among users who relied on it to ensure efficient token usage and effective problem-solving.
For both Opus 4.6 and 5, the thinking block is gone, and the extended thinking toggle option has disappeared from Claude Code. The CoT was really why I was sticking with Anthropic instead of switching fully to GPT--I rely on it to make sure Claude is going in the right direction without wasting tokens, and there's often useful stuff that shows up in the thinking block but isn’t surfaced in the answer. Is anyone else having this problem, and have you found a fix?