ByteDance Seed: Seed 1.6

The friction Seed 1.6 aims to remove is switching models as a task shifts between quick lookups and genuine reasoning. As a general-purpose model with adaptive deep thinking, it decides how much reasoning to apply, so a single deployment can handle a fast factual answer and a multi-step analysis without you swapping endpoints. It offers a 262,144-token context window, image input, chain-of-thought reasoning, function calling, and structured JSON output, priced at $0.25 per million input tokens. A concrete use is a knowledge-base assistant that fields simple staff questions cheaply but escalates its own effort when someone uploads a diagram and asks it to reason through a process, returning a structured result either way. Against Claude, ChatGPT, Gemini, and Claude Sonnet 5, which push for frontier quality at higher prices, this model's pitch is adaptive effort in one general-purpose package at mid-tier cost, rather than a fixed high-compute setting on every call. Ideal for teams that want one flexible model spanning a mix of easy and hard requests without managing several. The absence of a free tier means all usage is billed. Choose it when your workload genuinely varies and adaptive depth saves you juggling models; look elsewhere if your traffic is uniformly light, where a cheaper sibling fits, or uniformly demanding, where a frontier name may serve better.