Claude Sonnet 4.6 Now Available on AI Gateway

Anthropic's Claude Sonnet 4.6 is now live on Vercel's AI Gateway, offering developers access to a high-capability model that approaches Opus-level intelligence with strong improvements in agentic coding, code review, frontend UI quality, and computer use accuracy.

Key Capabilities

Agentic Features:

• Proactive task execution with subagent delegation
• Parallel tool call execution
• Model Context Protocol (MCP) support for scaled tool use
• Hybrid reasoning model delivering both near-instant responses and extended thinking

Integration with AI SDK

To use Sonnet 4.6, set the model identifier to anthropic/claude-sonnet-4.6 in your Vercel AI SDK configuration. The model supports the effort parameter and adaptive thinking mode for flexible extended reasoning:

const result = streamText({
  model: 'anthropic/claude-sonnet-4.6',
  providerOptions: {
    anthropic: {
      effort: 'medium',
      thinking: { type: 'adaptive' },
    },
  },
});

AI Gateway Features

Beyond model access, AI Gateway provides developers with:

• Unified API for calling multiple models
• Built-in usage tracking and cost monitoring
• Configurable retries, failover, and performance optimizations
• Observability and logging capabilities
• Bring Your Own Key (BYOK) support
• Intelligent provider routing with automatic failover

Developers can explore the model's capabilities in the AI Gateway model playground or reference the model leaderboard.