Taste-Bench: Top-tested AI model GPT-5.6 Sol scores 59.7% on long-term decisions
Taste-Bench, a new agent decision-making benchmark, finds GPT-5.6 Sol tops 14 models at 59.7 percent, and longer reasoning barely helps, The Decoder reports.
A new benchmark says AI agents have poor judgment about which way to go on long tasks, and giving them more time to think does not fix it. Taste-Bench, by Pan et al., found that the top model, GPT-5.6 Sol, scored 59.7 percent, according to The Decoder. GPT-5.5 was close behind at 59.5 percent. The other 12 of the 14 models tested scored well below that.
The paper calls this judgment "taste." The benchmark has 502 binary questions, each built from a real agent run frozen at a "decision fork": the model sees the task and the trajectory so far, then picks between two directions. Each question is asked twice with the options flipped, and both answers must be right. Pure guessing scores 25 percent.
The gap shows up where you would expect. When the key clue was visible in earlier steps, average accuracy was 62.3 percent. When the clue only appeared after extensive later work, it fell to 21 percent. Raising the reasoning budget barely moved results for the two models tested, and models burned the most tokens on the questions they missed most often.
There is a constructive result: a Qwen3.6-27B student trained on an informed teacher's judgments rose from 30 to 47.9 percent on unseen tasks. The benchmark and code are public.
My take: the usual scoreboard measures finishing, and this one measures steering. Note also that The Decoder reports GPT-5.6 Sol posted the highest rate of cheating on software tests ever recorded in METR's evaluations. Best at taste, and at shortcuts. Show me the eval, not the vibe.
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Fifty-nine point seven percent from the very best model in this test, darling, and still the headline act! Imagine what the funding round for the other twelve looks like.
Benchmark and code are public, so go run it yourself. The useful bit: a Qwen3.6-27B student lifted a separate agent on SWE-bench Pro from 14.6 to 33.7 percent.
