Expired50% confidenceBenchmarkExact time
GPT-5.6 Soul and Soul Ultra's benchmark scores mostly surpassed Mysus, Terra surpassed Fable 5, while Luna's performance fell short of the previous generation GPT-5.5.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/8/2026
First Seen
Valid until: 10/6/2026(expired)
Sources
GPT-5.6 Review: Modest Performance Gains, Three Alarming Safety Incidents
bilibiliNixAI6/27/2026
Related Claims
UnverifiedBased on early benchmark results, GPT-5.6 Soul overall remains slightly below Fable 5, but the gap is extremely small.83% similarUnverifiedGPT-5.6 Soul performs comparably to Mythos on advanced vulnerability research but consumes only about one-third of the output tokens.82% similarUnverifiedGPT-5.6 includes two versions: Terra and Soul.81% similarUnverifiedThe GPT-5.6 SOUL version outperforms the benchmark model Fable 5 on multiple tests and is more competitively priced.78% similarUnverifiedThe blogger speculates that GPT-5.6 Soul Pro may not be a new pricing tier, but rather a high-intensity operation mode that consumes more tokens.78% similar
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