Unverified50% confidenceBenchmarkExact time
For heavy rewrite tasks involving extended unattended operation, such as a TS-to-Rust migration project that GPT-4.1 Sol, Astra, and 5.6 Sol all failed to complete, Opus 5.5 rewrote it from scratch overnight.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/30/2026
First Seen
Valid until: 12/29/2026
Sources
Related Entities
Related Claims
UnverifiedThe previously attempted version 5.6 Sol failed to resolve the issue, while GPT-6 Astra ultimately identified the root cause of the fault.80% similarUnverifiedGPT-6.1 Sol has not demonstrated a clear qualitative capability leap over its predecessor on structured generation tasks.75% similarUnverifiedGPT-6.1 Sol lacks publicly available benchmark data to support its claim of intelligence approaching that of Astra.73% similarVerifiedSOL's benchmark score is nearly double that of the previous generation GPT-5.5, representing a generational leap, but still trails Fable 5 overall.70% similarVerifiedGPT-5.6 Sol achieves state of the art on the coding benchmark Terminal Bench.69% similar
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