Anthropic's Claude 4 lineup: Opus 4, the new coding king (SWE benchmark leader), and the free, capable Sonnet 4. Analysis includes benchmarks, coding tests (Mario platformer), and when to use each, despite a 200K context window.

Arindam Majumder

OpenAI

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Anthropic released Claude 4 with two variants: Claude Opus 4, positioned as the best AI coding model that leads the SWE benchmark with 72.5% score, and Claude Sonnet 4, a free generalist model. Both models feature a 200K context window, with Opus 4 costing $15/M input tokens and $75/M output tokens. Claude Opus 4 excels at complex reasoning tasks and can work autonomously for extended periods, while Sonnet 4 offers solid performance across common tasks at no cost. The analysis includes coding tests showing Opus 4's superior performance in building a Mario-style platformer game.

Claude 4.0: A Detailed Analysis

Claude 4 is pretty good, it’s much better than the other I’ve tried

Claude always finds it’s way back to the top when it comes to coding…

claude 4 is a huge step up over 3.7! super cool that pricing hasn’t changed