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Claude Sonnet 4.5: Revolutionary Coding Model Outshines Predecessor

10/2/2025

30 3 Full Breakdown

Summary

Story summary

Anthropic launched Claude Sonnet 4.5, describing it as the best coding model and capable of autonomous coding for over 30 hours.
It outperforms its predecessor Claude Opus 4, which managed about seven hours.
Claude Sonnet 4.5 scored 61.4% on OSWorld, up from 42.2% with Sonnet 4.
Anthropic's Claude Code revenue exceeds $500 million annually, with Apple and Meta among users.

History

Historical Context

The launch of OpenAI's Codex in 2021 represented a major leap in AI coding, achieving over 90% accuracy in code generation. This innovation attracted significant partnerships, notably with Microsoft. Concurrently, Anthropic's Claude Sonnet 4.5, introduced in 2025, showcased the increasing reliance on AI in software development, reflecting a broader trend towards automation in the tech industry.

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Story summary

Anthropic launched Claude Sonnet 4.5, describing it as the best coding model and capable of autonomous coding for over 30 hours.
It outperforms its predecessor Claude Opus 4, which managed about seven hours.
Claude Sonnet 4.5 scored 61.4% on OSWorld, up from 42.2% with Sonnet 4.
Anthropic's Claude Code revenue exceeds $500 million annually, with Apple and Meta among users.

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