Claude Opus 4.6 is the new top-ranked AI model, at least until Artificial Analysis finishes benchmarking OpenAI's Codex 5.3, which will likely pull ahead in coding. Anthropic's latest model leads the Artificial Analysis Intelligence Index, a composite of ten tests covering coding, agent tasks, and scientific reasoning, with first-place finishes in agent-based work tasks, terminal coding, and physics research problems.

Running the complete test suite costs $2,486, more than the $2,304 required for GPT-5.2 at maximum reasoning performance. Opus 4.6 consumed roughly 58 million output tokens, twice as many as Opus 4.5 but significantly fewer than GPT-5.2's 130 million. The higher total price comes down to Anthropic's token pricing of $5 and $25 per million input and output tokens, respectively.

Opus 4.6 is available through the Claude.ai apps and via Anthropic's API, Google Vertex, AWS Bedrock, and Microsoft Azure.

Anthropic just launched a new fast mode for Claude, and the pricing is steep: the "Fast Mode" for Opus 4.6 costs up to six times the standard rate. In return, Anthropic says the model responds 2.5 times faster at the same quality level. The mode is built for live debugging, rapid code iterations, and time-critical tasks. For longer autonomous runs, batch processing/CI-CD pipelines, and cost-sensitive workloads, Anthropic says you're better off sticking with standard mode.

Fast Mode can be toggled on in Claude Code with /fast and works across Cursor, GitHub Copilot, Figma, and Windsurf. There's a 50 percent introductory discount running until February 16. The mode isn't available through Amazon Bedrock, Google Vertex AI, or Microsoft Azure Foundry. Anthropic plans to expand API access down the line, interested developers can sign up for a waiting list.