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Claude/claude-sonnet-4-5-20250929

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Claude-sonnet-4-5-20250929 is Anthropic’s coding-focused AI model released in late September 2025. It emphasizes stronger coding performance, extended context handling, improved alignment, and safer interactions, enabling more reliable software development, debugging, and complex agent tasks.

INPUT PRICE

$ 2.1
30% off
$ 3

Input / 1M tokens

OUTPUT PRICE

$ 10.5
30% off
$ 15

Output / 1M tokens

INPUT

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OUTPUT

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claude-sonnet-4-5-20250929 Use Cases

Three practical use cases where claude-sonnet-4-5-20250929 delivers exceptional results in real-world scenarios.

Automating Customer Support Responses

Businesses use claude-sonnet-4-5-20250929 to handle customer queries, delivering accurate, friendly replies instantly and reducing manual workload.

Streamlining Data Analysis for Researchers

Researchers leverage claude-sonnet-4-5-20250929 to summarize complex datasets, extract key trends, and generate actionable reports quickly.

Enhanced Creative Writing Assistance

Writers and marketers rely on claude-sonnet-4-5-20250929 for fresh content ideas, compelling ad copy, and drafting manuscripts in record time.

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Getting Started with Gptproto — Build with claude-sonnet-4-5-20250929 in Minutes

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

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Your balance can be used across all models on the platform, including claude-sonnet-4-5-20250929, 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.

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Make your first API call

Use your API key with our sample code to send a request to claude-sonnet-4-5-20250929 via Gptproto and see instant AI‑powered results.

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

claude-sonnet-4-5-20250929 User Reviews

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