Based on 4 capability dimensions
6 versions
Anthropic introduced Claude Sonnet 4.6, described as delivering frontier performance across coding, agents, and professional work at scale. This represents a new version in the Sonnet model line.
Extended thinking mode introduced. Biggest leap in coding and reasoning. Computer use improved.
Outperforms Claude 3 Opus at twice the speed. Sets new benchmark for coding tasks.
Most capable Claude model at launch. Beats GPT-4 on most benchmarks. Three tier family introduced.
Major upgrade. Context window expanded to 100K tokens. Improved reasoning and safer responses.
5 versions
GPT-5.5 is described as OpenAI's smartest model yet, offering faster performance and increased capabilities. It is built for complex tasks including coding, research, and data analysis across tools.
Reasoning model that thinks before answering. Excels at complex math, science and coding problems.
Omni model. Faster and cheaper than GPT-4. Real-time audio and vision. Emotional voice responses.
Massive capability jump. Multimodal inputs introduced. Passed bar exam in top 10 percentile.
Initial ChatGPT launch. Shocked the world with conversational AI. Reached 1 million users in 5 days.