GPT-5.6 — OpenAI's Three-Tier Frontier Model Family

GLM-5.2 is Z.ai's open-weights reasoning model, released in June 2026, aimed at developers and enterprises that need long-horizon coding, agent workflows, and document-heavy pipelines without locking into a closed API. It pairs a 1-million-token context window with MIT-licensed weights you can self-host or call through more than 20 providers. Core Features A Mixture-of-Experts transformer with ...

Muse Spark 1.1 is Meta AI's newest frontier model and its first paid developer API, launched in July 2026. It targets builders and enterprises who want a long-context, agentic coding and research model that can run subagents, control a computer across desktop, browser, and mobile, and tackle benchmark-hard tasks. Core Features A 1,000,000-token context window that lets the model hold entire cod...

SenseNova U1 Pro is SenseTime's flagship native multimodal agent foundation model, built for teams that need an AI system to finish long, multi-step creative and operational tasks rather than just generate one-off assets. Released at WAIC on July 18, 2026, it targets enterprises and developers who are tired of re-rolling every image or video prompt and want consistent, delivery-ready output. If...

Kimi K3 is Moonshot AI's 2.8-trillion-parameter flagship model, released July 16, 2026, and the first open-weight model in the three-trillion class, built for developers and enterprises creating coding agents, research tools, and long-context applications. It is closer to an agent engine than a chat assistant, designed to use tools and finish complex work with less supervision. Core Features 2....

BaseRT is an open-source large language model inference runtime built from the ground up for Apple Silicon. Developed by Base Compute, it promises the fastest local LLM performance on M1 and later Macs by using hand-written Metal kernels and a custom model format called .base. With a single CLI, you can pull models from Hugging Face, chat with them, serve an OpenAI-compatible API, or convert ex...

Auriko is an AI control plane for LLM inference that treats model providers as trading venues and arbitrages the spread. Built by former quant traders, it unifies access to OpenAI, Anthropic, Google, DeepSeek, and other providers behind a single OpenAI-compatible API. Auriko's cost-arbitrage engine calibrates to each user's request patterns and selects the optimal inference path based on token ...

Together AI is a full-stack AI cloud platform offering serverless inference, fine-tuning, and GPU clusters for open-source AI models. Access 200+ models including Llama, DeepSeek, Qwen, and Flux through a unified API with pay-per-token pricing. Features up to 2.75x faster inference, dedicated endpoints, and costs up to 11x lower than GPT-4. Free tier available with $1 credits.

OpenRouter is a unified API gateway providing access to 500+ AI models from 60+ providers through a single OpenAI-compatible endpoint. Developers can seamlessly switch between GPT, Claude, Gemini, Llama, and more without managing multiple API keys. Features include provider fallback, cost optimization, free tier access, and a built-in chat interface for model experimentation with transparent pay-as-you-go pricing.

Astria AI is a powerful fine-tuning API platform that enables developers and businesses to create custom AI-generated images. Specializing in professional headshots, virtual try-on, and personalized image generation, Astria leverages Flux and Stable Diffusion models for studio-quality results. With pay-as-you-go pricing starting at $1.50 per model iteration, it offers flexible solutions for developers building AI image applications.

StepFun is a leading Chinese AI company in 2026, offering the StepFun AI chat platform powered by their flagship Step3 and Step 3.5 Flash models. Built on Mixture-of-Experts architecture with 321B total parameters and 38B active, StepFun excels in reasoning, coding, and multimodal tasks—achieving 74.4% on SWE-bench Verified and topping AIME 2025 benchmarks.