Expired50% confidenceOpinionExact time
On the Terminal Bench test, GPT-5.5 and Fable score very closely, suggesting that agent-type tasks are entering a plateau where the marginal returns of scaling up parameters are diminishing.
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
UnverifiedThe GPT-5.6 flagship model has set new technical benchmarks in benchmarks such as Terminal Bench, with outstanding performance in coding workflows.75% similarUnverifiedGPT-5.6 achieves state-of-the-art results on Terminal Bench, BrowseComp, and Agent's Last Exam, and on the DeepSuite evaluation delivers better performance at less than half the cost of competing products72% similarUnverifiedGPT 5.5 leads on TerminalBench 2.0 with a score of 87%, surpassing even Anthropic's unreleased Mythos model71% similarPartially VerifiedOpenAI states that GPT-5.6 achieves the current state-of-the-art on Terminal Bench 2.1.71% similarUnverifiedReasoning models still outperform GPT 5.5 Instant on the Troubleshooting Bench, exceeding human expert levels, while the Instant version approaches but does not surpass expert performance.70% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/230732API
curl https://kongchang.com/api/v1/knowledge/claims/230732MCP
get_claim(id=230732)