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Claude/claude-sonnet-4-5-20250929-thinking

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Claude-sonnet-4-5-20250929-thinking is Anthropic’s coding-focused AI model, released in late September 2025. It’s advertised as the strongest coding model to date, with improved ability to write and debug code, use computers, and build production-ready applications. It also emphasizes better alignment, reduced prompt-injection susceptibility, and enhanced performance on tasks like cybersecurity, finance, and long-horizon reasoning.

INPUT PRICE

$ 2.1
30% off
$ 3

Input / 1M tokens

OUTPUT PRICE

$ 10.5
30% off
$ 15

Output / 1M tokens

INPUT

Text

OUTPUT

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claude-sonnet-4-5-20250929-thinking Use Cases

Discover real-world applications of claude-sonnet-4-5-20250929-thinking across industries.

Automated Technical Support

claude-sonnet-4-5-20250929-thinking powers a 24/7 chatbot, accurately resolving customer queries on a software platform, reducing ticket load and improving user satisfaction.

Academic Literature Summarization

Researchers use claude-sonnet-4-5-20250929-thinking to generate concise, insightful abstracts from lengthy research papers, saving preparation time for publications.

Creative Marketing Campaigns

A marketing team leverages claude-sonnet-4-5-20250929-thinking to brainstorm, draft, and localize engaging ad copy for international product launches in multiple languages.

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Follow these simple steps to set up your account, get credits, and start sending API requests to claude-sonnet-4-5-20250929-thinking via Gptproto.

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Your balance can be used across all models on the platform, including claude-sonnet-4-5-20250929-thinking, giving you the flexibility to experiment and scale as needed.

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In your dashboard, create an API key — you’ll need it to authenticate when making requests to claude-sonnet-4-5-20250929-thinking.

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claude-sonnet-4-5-20250929-thinking Frequently Asked Questions

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Claude-sonnet-4-5-20250929-thinking | Coding AI | GPT Proto AI API