Claude 2
Anthropic · July 2023
☠ discontinuedCloseddecoder onlytextAPI Available
Parameters~130B
Context Window100K tokens
Sunset DateOctober 2024
Why It Matters
Pioneered the 100K-token context window, making it one of the first models capable of processing book-length documents. Made Claude competitive for professional use cases.
Description
Major upgrade that expanded the context window to 100K tokens — enough to process roughly 75,000 words or an entire novel in a single conversation. Significantly improved at coding, math, and reasoning tasks compared to Claude 1.
Notable Milestones
- ▸First widely available model to process 100K tokens of context
- ▸Scored 71.2% on the Bar Exam (up from 73rd to 90th percentile)
Key Innovations
Constitutional AI
Constitutional AIAnthropic's approach to AI safety where the model critiques and revises its own outputs against a set of principles.
Long Context
Long ContextAbility to process very long inputs (100K+ tokens), enabling analysis of entire codebases or books.
Related Research (1)
Constitutional AIAlignment
2022 · Anthropic
Introduced RL from AI Feedback using "constitutions" (rule sets) for self-supervision, reducing reliance on human labels for harmlessness training.