Claude 3 Opus
Anthropic's most capable 2024 model, the benchmark for careful reasoning.
About
Claude 3 Opus launched on March 4, 2024 as the top tier of the Claude 3 family (Haiku, Sonnet, Opus). At release it led graduate-level reasoning, math, and multilingual benchmarks among publicly available models, and introduced a 200K-token context window to Anthropic's API lineup.
Opus became the reference point for the 'most intelligent model' crown in the first half of 2024 before being succeeded by Claude 3.5 Sonnet. It remains available via the Anthropic API and partner platforms as a closed, API-only model with no public weights.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 74; Trending score 78/100 from researcher assessment.