Story perspectives

Claude Sonnet 4 Dominates Market, Captures 75% User Switch

10/10/2025

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Summary

Story summary

Anthropic launched the Claude Sonnet 4 model in May 2025, achieving rapid adoption with 75% of API users switching within a week.
The model gained significant traction among coders, capturing over double the market share of OpenAI among enterprise developers, according to Menlo Ventures.
Anthropic expanded Sonnet's context window to handle prompts of up to 75,000 lines of code.
In September 2025, the company released Sonnet 4.5, which provides faster and more accurate calculations.
Salesforce, led by CEO Marc Benioff, is among Anthropic's investors.

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Story summary

Anthropic launched the Claude Sonnet 4 model in May 2025, achieving rapid adoption with 75% of API users switching within a week.
The model gained significant traction among coders, capturing over double the market share of OpenAI among enterprise developers, according to Menlo Ventures.
Anthropic expanded Sonnet's context window to handle prompts of up to 75,000 lines of code.
In September 2025, the company released Sonnet 4.5, which provides faster and more accurate calculations.
Salesforce, led by CEO Marc Benioff, is among Anthropic's investors.