reasoning
Humanity's Last Exam
- #42default of 58746.5%
Leader: Opus 5.5 · 61.4%
Other · released 2026-09-18
Measured on 25 benchmarks.
General frontier
47.8
#41 of 136 models
includes estimates: 24% of the mix is measured for this model
reasoning
Leader: Opus 5.5 · 61.4%
knowledge
Leader: Opus 5.5 · 46.4
agentic
Leader: Gemini 3.7 Flash · 60.0%
agentic
Leader: Sonnet 5.5 · 1823
agentic
Leader: Gemini 3.5 Flash · 47.1%
agentic
Leader: Gemini 4 · 77.5%
agentic
Leader: Fable 5 · 51.1%
agentic
Leader: GPT-5.6 Sol · 56.2%
coding
Leader: Opus 5.5 · 66.9%
coding
Leader: GPT-6 Astra · 63.3%
coding
Leader: Sonnet 5.5 · 63.6%
composite
Leader: Opus 5.5 · 57.6
cost
Leader: GPT-6 Luna · $0.00
cost
Leader: GPT-6 Luna · $10.63
economics
Leader: Muse Wonder Full (Max) · 32.6%
economics
Leader: Opus 5.5 · 1866
knowledge
Leader: Fable 5.1 · 67.2%
knowledge
Leader: MiniCPM5-1B (Non-reasoning) · 99.1%
knowledge
Leader: Opus 5.5 · 87.7%
long-context
Leader: Kimi K3 · 88.7%
long-context
Leader: Sonnet 5.5 · 75.0%
reasoning
Leader: Muse Wonder Full (Max) · 32.9%
safety
Leader: Grok 4.7 · 68.3%
speed
Leader: Gemini 2.5 Flash-Lite · 0.3s
speed
Leader: Celeris-1 · 1522.5