Anthropic Unveils Claude Opus 5, a New Flagship Model for Coding and Knowledge Work
Anthropic has announced Claude Opus 5, the latest addition to its Opus line. Built to be thoughtful and proactive, it posts state-of-the-art results on coding and knowledge-work evaluations. Pricing stays unchanged from the previous Opus 4.8, and the model rolled out simultaneously across Claude.ai, Claude Code, Claude Cowork, and the API.
Details
- Positioning: Strengthened verification and iterative problem-solving, plus better visual output quality. Designed with a thoughtful, proactive character
- Benchmarks: Tops all competitors on Frontier-Bench v0.1, doubling Opus 4.8βs score at lower cost. On CursorBench 3.2 it comes within 0.5% of Claude Fable 5βs peak performance at half the cost. Scores three times higher than the next-best model on ARC-AGI 3, roughly 1.5x the completion rate of the next competitor on Zapier AutomationBench, and beats Fable 5βs OSWorld 2.0 result at about a third of the cost
- Domain gains: Organic chemistry tasks improved 10.2 percentage points over Opus 4.8, and protein-analysis tasks improved 7.7 percentage points
- Pricing unchanged: $5 per million input tokens, $25 per million output tokens β identical to Opus 4.8. A fast mode runs at 2.5x the speed for 2x the base price
- Availability: Claude.ai, Claude Code, Claude Cowork, and the Claude API (model name
claude-opus-5) all launched simultaneously - Safety: Anthropic reports improved alignment and safety metrics, along with lower variance in behavior on agentic tasks
- Use cases: Examples cited include a trading firm building a market-data feed for a new exchange in a single session, a computer-vision pipeline that reconstructs a 3D CAD model from drawing images, and correctly identifying the root cause of an open-source bug that a competing model only patched at the surface level
How to try it
- Select βClaude Opus 5β from the model picker in Claude.ai, Claude Code, or Claude Cowork
- When using the API, specify the model name
claude-opus-5in your requests - Enable fast mode for quicker responses (2.5x the speed at 2x the price)