Artificial intelligence · 2025

Claude Opus 4.5

The first model above 80% on SWE-bench Verified.

Released November 24, 2025, Claude Opus 4.5 scored 80.9% on SWE-bench Verified and cut Opus pricing by two thirds. It extended long-horizon agentic work in coding and computer use.

See it in the living tree Wikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 1

Claude Sonnet 4.5 2025

What it led to 3

Claude Opus 4.6 2026
Autonomous AI researchers ~2029
Artificial general intelligence ~2032

Watch

Introducing Claude Opus 4.5Anthropic · YouTube

Related measurements

The dashed line marks when it first worked.

Best AI score on GPQA Diamond Latest: 95.8 % correct (2026) Source: Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv); Anthropic: Claude 3 public launch (March 4, 2024)

Training compute of notable AI models Source: Epoch AI, Notable AI Models (CC BY 4.0)