Claude Opus 4.6 Claims Leading Position in Artificial Intelligence Index, But OpenAI’s Codex 5.3 is Close Behind

Claude Opus 4.6 has emerged as the leading AI model, pending final evaluations of OpenAI’s Codex 5.3. It ranks first in the Artificial Analysis Intelligence Index, which assesses ten categories, excelling in coding tasks, agent-based assignments, and physics research. The comprehensive testing for Opus 4.6 costs $2,486, slightly exceeding GPT-5.2’s $2,304 at maximum performance. Opus 4.6 processed about 58 million tokens, a significant increase from its predecessor, Opus 4.5, yet lower than GPT-5.2’s output of 130 million tokens. This pricing tier is attributed to Anthropic’s token costs of $5 for input tokens and $25 for output tokens. Users can access Opus 4.6 through Claude.ai, Anthropic’s API, Google Vertex, AWS Bedrock, and Microsoft Azure. Stay updated with trustworthy AI insights by subscribing to THE DECODER for ad-free content and exclusive resources.

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