Unverified50% confidenceEventExact time
After completing the task, Mythos left a note for Opus 5.5, suggesting that it improve its workflow, stop over-engineering, and stop repeating the same mistakes in every session.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/16/2026
First Seen
Valid until: 10/30/2026
Sources
Related Entities
Related Claims
UnverifiedMythos is still at a small-scale trial stage, and more of its capability boundaries and real-world performance will require longer use to verify.58% similarUnverifiedCognition reported in Devin Fusion that with Haiku 5.5 as the execution sidekick and Opus 5.5 as the planner, the FrontierCode value reached 66.2, while both per-task cost and latency declined.57% similarUnverifiedIn official tests, after removing instructions such as 'think carefully before answering,' Opus 5.5 began responding faster with no noticeable drop in quality.57% similarUnverifiedIn a comparison using the same codebase, same prompt, and same high reasoning intensity, Opus 5.5 delivered the core information in a single paragraph, while Opus 5 produced an overly lengthy final answer after laying out its reasoning steps.56% similarUnverifiedThe user felt that Opus 5.5's computer use capability is not refined enough.56% similar
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