
Best AI SDKs for App Development in 2026
Compare five leading AI developer SDKs - Vercel AI SDK 7, LangChain, LlamaIndex, Mastra, and PydanticAI - and find the right framework for your next AI-powered app.
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Compare five leading AI developer SDKs - Vercel AI SDK 7, LangChain, LlamaIndex, Mastra, and PydanticAI - and find the right framework for your next AI-powered app.

Cloudflare opens a private beta charging AI crawlers $0.01 or more per page using HTTP 402 and Ed25519-signed request headers, with new sites blocking AI training by default on September 15.

xAI's Grok Imagine Video 1.5 is the #1-ranked image-to-video model on Artificial Analysis, generating 720p clips with native audio at $0.14/s - 86% cheaper than Sora 2 Pro.

ByteDance's top-ranked AI video generation model with native joint audio-video synthesis, multi-shot support, and multimodal reference inputs across up to 12 files per generation.

HappyHorse-1.0 is Alibaba's 15-billion-parameter video generation model that ranked #1 on Artificial Analysis, producing 720p-1080p clips with joint audio-video synthesis in a single forward pass.

OpenAI's Sora 2 generates physics-accurate video with synchronized audio from text or images, available API-only until its September 24, 2026 sunset.

Runway's Gen-4.5 is a video generation model built on an Autoregressive-to-Diffusion architecture that held the top Artificial Analysis Elo position at launch with 1,247 points before Seedance 2.0 and Kling 3.0 surpassed it in early 2026.

A hands-on comparison of seven LLM gateway and routing tools - LiteLLM, Portkey, Helicone, OpenRouter, Martian, Cloudflare AI Gateway, and Bifrost.

Google's new streaming audio model translates speech in real time across 70+ languages - available now in Google Translate and via the Gemini Live API.

Anthropic's Claude Opus 4.8 scores 69.2% on SWE-bench Pro and ships hundreds of parallel subagents in Claude Code, with pricing unchanged at $5 per million input tokens.

Grok Build 0.1 is xAI's first model built specifically for agentic coding workflows, with a 256K context window, native MCP support, and always-on reasoning at $1/M input tokens.

Migrate from GPT-4o (now retired) or GPT-5.1 to self-hosted Llama 4 with near-zero code changes, but plan carefully for hardware, EU licensing, and realistic context window limits.