Best LLMs for Coding

Quick answer · Updated June 2026

Claude Fable 5 is the best LLM for coding, with a 62.0 Artificial Analysis Coding Index across benchmarks like SWE-bench and SciCode. Claude Opus 4.8 (56.7) and GPT-5.5 (56.2) round out the top three.

62.0Coding

64.9Intelligence

$10.00Input /M

1MContext

AI models ranked by the Artificial Analysis Coding Index, measuring real-world software engineering ability across benchmarks like SWE-bench, SciCode and terminal tasks. The best LLMs for code generation, debugging and agentic development.

Frequently asked

What is the best LLM for coding?

What's a good alternative to Claude Fable 5?

Claude Opus 4.8 (56.7) is the closest alternative on this metric, followed by GPT-5.5 (56.2). See the full ranking above for the tradeoffs.

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