Anthropic's Claude Opus 4.5 is Live in Cline

Claude Opus 4.5 is now available through the Cline provider. It's highly performant on benchmarks: 80.9% SWE-bench Verified, 59.3% on Terminal-bench 2.0. Up to 65% fewer tokens than previous models on comparable tasks.

Pricing is $5/$25 per million tokens with a 200K context window.

When to reach for Opus 4.5

Sonnet 4.5 remains the cost-effective choice for straightforward tasks. It's fast, capable, and handles most day-to-day coding work well.

Opus 4.5 is the model you switch to when tasks get compicated. Complex multi-step problems where the path isn't obvious. Heavy MCP usage with multiple tools orchestrated together. Tasks that require reasoning through ambiguity without constant hand-holding.

Anthropic's internal testing showed the model "just gets it" when pointed at complex, multi-system bugs. Tasks that were near-impossible for Sonnet 4.5 are now within reach.

Token efficiency

Opus 4.5 uses dramatically fewer tokens to reach similar or better outcomes. Less backtracking, less redundant exploration, less verbose reasoning.

In Anthropic's testing, at medium effort Opus 4.5 matches Sonnet 4.5's best SWE-bench score while using 76% fewer output tokens. At high effort, it exceeds Sonnet 4.5 by 4.3 percentage points while using 48% fewer tokens.

For long Cline sessions, this efficiency compounds. More work done per dollar spent.

The model is available now as claude-opus-4-5 through the Cline provider. 200K context window at $5 per million input tokens and $15 per million output tokens.

Share your experiences with complex, multi-step tasks on Reddit or Discord.