5.5 on 16 Reasoning Effort on thinking - Heavy, bug?

<table> <tr><td> <a href="https://www.reddit.com/r/ChatGPT/comments/1t2o811/55_at_16_juice_on_heavy_bug/"> <img alt="5.5 at 16 Juice on Heavy? Bug?"

<table> <tr><td> <a href="https://www.reddit.com/r/ChatGPT/comments/1us7usq/sol_says_that_its_actually_55_thinking/"> <img alt="Sol says that it's actually 5.5 thinking"

<!-- SC_OFF --><div class="md"><p>As the title says. I'm getting absolutely no thinking time reported on my prompts, and the answers are coming out completely instant. It feels

<!-- SC_OFF --><div class="md"><blockquote> <p>Wait, I need to be careful about the &quot;no_think&quot; tag in the system prompt. The system prompt says <code>/no_think</code>.

<table> <tr><td> <a href="https://www.reddit.com/r/ChatGPT/comments/1suzko9/what_are_the_available_reasoning_levels_for_55/"> <img alt="What are the available reasoning levels for

<table> <tr><td> <a href="https://www.reddit.com/r/ChatGPT/comments/1s0bluj/gpt_54_reasoning_budgets_compared/"> <img alt="GPT 5.4 reasoning budgets compared"

<table> <tr><td> <a href="https://www.reddit.com/r/ChatGPT/comments/1s3ym8r/why_does_this_happen_even_in_thinking_mode_i/"> <img alt="Why does this happen even in thinking mode?

<!-- SC_OFF --><div class="md"><p>I’m on ChatGPT Pro (model 5.5) and I’m noticing something weird: prompts that used to “think” for 20, 30, 40+ minutes now seem to stop after