Claude Opus 5.5 and ChatGPT-6 Astra each answered the same one-line prompt about the Bitcoin (BTC) price with a single December 31 figure — $91,500 and $94,000, respectively.

Neither system was asked for a range or a probability. Each was instructed to name one specific closing price for December 31, 2026, leaving a $2,500 gap between the two answers — a spread of roughly 2.7%.

One Prompt, Two Point Forecasts

The format required both models to commit to a single number rather than hedge with scenario ranges or confidence levels. Claude Opus 5.5, a member of Anthropic's Claude model family, settled on $91,500, while ChatGPT-6 Astra, from OpenAI's ChatGPT line, returned $94,000. Because no probability estimates were requested, neither figure was attached to a stated likelihood of occurring. And because both figures point to the same date, the comparison can be settled outright once Bitcoin's actual price at the end of 2026 is on record.

Context: Bitcoin and AI Price Prompts

Bitcoin is the largest cryptocurrency by market capitalization and trades continuously on exchanges around the world, which means there is no single universal closing price and any year-end figure depends on the exchange or data source consulted. Asking chatbots to name a specific year-end price has become a recurring prompt format in crypto coverage, giving readers a side-by-side comparison of how different models answer an identical question. Outputs of this kind are generated by language models from patterns in their training data rather than produced by formal financial models, and, as in this case, they typically arrive without any stated probability.

This content was first published on COINOTAG: https://en.coinotag.com/claude-opus-5-5-bitcoin-btc-91500-year-end-forecast