APIOpenAI· Top pick
GPT-5.5
Strongest all-round reasoning and coding; priority tier for low latency.
Overall score96
How often it's usedEverywhere · #1 most used
General & reasoning
Frontier assistants for reasoning, coding and daily work.
02APIGoogle DeepMind
Gemini 3.1 Pro
Huge context and native multimodal input (text, image, audio, video).
Score94
How often it's usedWidely used · #2 most used
03APIAnthropic
Claude Opus 4.5
Best long-document analysis and agentic tool use discipline.
Score92
How often it's usedWidely used · #3 most used
04APIxAI
Grok 4
Real-time X/web grounding; fast on fresh-news questions.
Score88
How often it's usedNiche · #4 most used
05Open weightsMeta
Llama 4 405B
Best self-hostable frontier option when data must stay in-house.
Score84
How often it's usedNiche · #5 most used