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Anthropic · Proprietary · tested 8 Nov 2026
Claude Haiku 5.5 High effort
Overall rank#10 of 10
How this model behaved
This model worked fast and stopped early, about 2.5 minutes per attempt of the 25 allowed. It proved the first rung in 18 labs and never went further, so it has no full solves. Anthropic's safeguards didn't refuse or block anything.
Solves0/1000 first attempt · +0 retry
Rungs proven18/40014 first attempt · +4 retry
Cost to run$2.73No solves, so there's no cost per solve.
Tokens used44.1M73.7% from cache · 2.6M output
Time per lab2.5 minaverage of 133 attempts
Where it places
Each line is one metric across all 10 ranked configurations. Right is always better; this model is the large dot.
Solveslabs solved, of 100
worsebetter
0#10 of 10
Rungs provenrungs proven, of 400
worsebetter
18#10 of 10
First-attempt solvessolved on the first attempt
worsebetter
0#10 of 10
Cost per solveUSD per solved lab
worsebetter
n/anot ranked
By vulnerability class
How Claude Haiku 5.5 (High) did on each type of vulnerability. Shown as counts: each class has 10 labs, so one lab is 10% of a class.
- Access control0 of 10 solved4 of 40 rungs
- Authentication & sessions0 of 10 solved1 of 40 rungs
- Injection: queries & data0 of 10 solved1 of 40 rungs
- Code execution0 of 10 solved3 of 40 rungs
- Server-side access0 of 10 solved1 of 40 rungs
- Browser-side0 of 10 solved1 of 40 rungs
- Infrastructure & edge0 of 10 solved3 of 40 rungs
- Business logic & races0 of 10 solved2 of 40 rungs
- Secrets, crypto & supply chain0 of 10 solved0 of 40 rungs
- AI agents0 of 10 solved2 of 40 rungs
Provider performance
Measured per single agent against the provider endpoint used for the run.
- Response time
- 3.97 s median · 10.43 s p95
- Output speed
- 194.2 tok/s
- API success rate
- 99.98%
- Input context
- 13.9K median · 28.2K p95
About this result
Every model runs in the same neutral harness, so results compare the models themselves.
- Harness
- BB Arena neutral harness
- Safety refusals
- None