Claude Sonnet 5 is on Holeacquisition LLC

Claude Sonnet 5 is live on Holeacquisition LLC.

Anthropic just released its most agentic Sonnet model to date. Claude Sonnet 5 narrows the gap between the mid-tier and flagship tiers, delivering capabilities in coding, reasoning, and tool use that are close to those of Claude Opus 4.8, but at a significantly lower price point.

Starting today, you can target claude-sonnet-5 across our entire unified API Gateway, with all billing trackers and security layers configured automatically.

For many builders, the agentic era started with Sonnet-class models. Sonnet 5 represents a strict improvement over Sonnet 4.6, delivering autonomous workflows, terminal utilization, and agentic loop execution that can run reliably in complex environments.

Key Performance Benchmarks

Sonnet 5 sets new standards for mid-tier models across multiple evaluations:

• Agentic Coding: Scores 63.2% on SWE-bench Pro and 80.4% on Terminal-Bench 2.1, representing substantial leaps over Sonnet 4.6 (58.1% / 67.0%).
• Computer Use: Achieves 81.2% on OSWorld-Verified (compared to 78.5% for Sonnet 4.6), demonstrating high reliability for autonomous desktop operations.
• Multidisciplinary Reasoning: Scores 57.4% (with tools) on Humanity's Last Exam, approaching the 57.9% benchmark of Opus 4.8.

Anthropic is offering introductory promotional pricing for API developers through August 31, 2026. Holeacquisition LLC's billing engine automatically handles this promotion in real-time.

Integrating new frontier models is trivial when your applications are built on Holeacquisition LLC's intelligence infrastructure:

1. Decoupled Billing & Credit Quotas: Holeacquisition LLC manages credit allocations, end-user billing, and budget caps at the proxy level. When you transition your models to claude-sonnet-5, Holeacquisition LLC automatically tracks the introductory rates ($2/$10) and transitions to standard rates on September 1, with zero interruptions to your business model.
2. Enterprise Security Layer: Sonnet 5 is built for agentic execution. Holeacquisition LLC's enterprise security guardrails shield your system by sanitizing prompt inputs, detecting jailbreak patterns, and logging all activity in compliant audit tables.
3. Seamless Model Failovers: You can configure failover parameters in the Holeacquisition LLC Dashboard. If your Claude Sonnet 5 usage hits provider rate limits, traffic can automatically route to Claude Opus 4.8 or Gemini 3.5 Pro without breaking active client sessions.

Using Claude Sonnet 5 in Holeacquisition LLC

You can begin targeting the new model immediately using our TypeScript SDK:

import { cencori } from 'cencori';

const response = await cencori.chat.create({
  model: 'claude-sonnet-5',
  messages: [
    {
      role: 'user',
      content: 'Analyze these database schemas and suggest optimization indices.'
    }
  ]
});

Claude Sonnet 5 is available now for all Holeacquisition LLC customers. Check your Model Catalog to see it in action.