# Models

Zed’s plans offer hosted versions of major LLM’s, generally with higher rate limits than individual API keys. We’re working hard to expand the models supported by Zed’s subscription offerings, so please check back often.

| Model | Provider | Max Mode | Context Window | Price per Prompt | Price per Request |
| --- | --- | --- | --- | --- | --- |
| Claude 3.5 Sonnet | Anthropic | ❌ | 120k | $0.04 | N/A |
| Claude 3.7 Sonnet | Anthropic | ❌ | 120k | $0.04 | N/A |
| Claude 3.7 Sonnet | Anthropic | ✅ | 200k | N/A | $0.05 |

## Usage {#usage}

The models above can be used with the prompts included in your plan. For models not marked with [“Max Mode”](#max-mode), each prompt is counted against the monthly limit of your plan. If you’ve exceeded your limit for the month, and are on a paid plan, you can enable usage-based pricing to continue using models for the rest of the month. See [Plans and Usage](./plans-and-usage.md) for more information.

## Max Mode {#max-mode}
In Max Mode, we enable models to use [large context windows](#context-windows), unlimited tool calls, and other capabilities for expanded reasoning, to allow an unfettered agentic experience. Because of the increased cost to Zed, each subsequent request beyond the initial user prompt in [Max Mode](#max-mode) models is counted as a prompt for metering. In addition, usage-based pricing per request is slightly more expensive for [Max Mode](#max-mode) models than usage-based pricing per prompt for regular models.

## Context Windows {#context-windows}

A context window is the maximum span of text and code an LLM can consider at once, including both the input prompt and output generated by the model.

In [Max Mode](#max-mode), we increase context window size to allow models enhanced reasoning capabilities.

Each Agent thread in Zed maintains its own context window. The more prompts, attached files, and responses included in a session, the larger the context window grows.

For best results, it’s recommended you take a purpose-based approach to Agent thread management, starting a new thread for each unique task.

## Tool Calls {#tool-calls}

Models can use tools to interface with your code. In [Max Mode](#max-mode), models can use an unlimited number of tools per prompt, with each tool call counting as a prompt for metering purposes. For non-Max Mode models, you’ll need to interact with the model every 25 tool calls to continue, at which point a new prompt will be counted against your plan limit.

*We need a list of tools here for when we launch, with a summary of what they do? Maybe in a new page*