Claude 4 API Free: 3 Methods for Unlimited Access in 2025

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Get Claude 4 API free through Puter.js (100% unlimited), LaoZhang.ai ($10 credits + 70% savings), or Claude.ai daily access. Complete implementation guide with code examples for Opus 4 and Sonnet 4 models. No credit card required.

GPT-5 API: Complete 2025 Guide – Release Date, Features & Implementation

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GPT-5 API launches August 2025 with 256K context, multi-agent AI, and PhD-level reasoning. Learn implementation strategies, cost optimization with 30-70% savings via laozhang.ai, and prepare your applications today with our comprehensive developer guide.

Image to Image Sora API: 2025 Complete Guide + Best Alternatives

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OpenAI’s Sora has no API yet. Discover the best image-to-image transformation alternatives like FLUX, Stable Diffusion, and DALL-E 3. Get 30-70% cost savings with unified API access through laozhang.ai. Complete implementation guide with code examples.

Free Claude Sonnet API: Complete Access Guide 2025

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Access free Claude Sonnet API through 5 proven methods. Learn Puter.js browser integration, save 60% with laozhang.ai, and explore open-source alternatives. Complete implementation guide with code examples for developers seeking Claude 4 capabilities without official free tier.

Free GPT-4o Image API: Complete Guide to Access AI Generation (2025)

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Access free GPT-4o image API through $10 OpenAI credits, ChatGPT Free tier, or save 80% with laozhang.ai. Compare Flux.1, HiDream-I1, and SD3.5 alternatives. Complete setup guides, code examples, and cost optimization strategies for developers seeking free AI image generation.

O4-mini API 并发限制详解:200K TPM高性价比模型完全指南(2025)

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深入解析o4-mini API的并发限制:200K TPM、~1200 RPM,成本降低90%。本文提供从技术原理到实战应用的完整指南,包括异步请求优化、429错误处理、高并发架构设计等。通过laozhang.ai即可立即使用,无需等待账户升级。

ChatGPT Study Mode: Complete Guide to AI-Powered Socratic Learning

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Master ChatGPT Study Mode with our comprehensive 2025 guide. Learn how this AI tutor increases retention by 73% through Socratic questioning. Discover activation steps, API integration via laozhang.ai, educational theory, and real-world success stories from Stanford and Microsoft.