---
title: "Context usage"
canonical: "https://canmyagentuse.com/features/context-usage-visibility"
contentKind: "feature"
locale: "en"
description: "Show how much of the current context budget is used or remains."
llmSummary: "Context usage means the product reports current context consumption or remaining capacity; exact counters, estimates, source breakdowns, and warnings are qualifiers."
publishedAt: "2026-08-28T00:00:00.000Z"
updatedAt: "2026-08-28T00:00:00.000Z"
verifiedAt: "2026-08-28"
tags: ["context","tokens","observability"]
---

# Context usage

Context usage means the product reports current context consumption or remaining capacity; exact counters, estimates, source breakdowns, and warnings are qualifiers.

- HTML: https://canmyagentuse.com/features/context-usage-visibility
- JSON: https://canmyagentuse.com/api/v1/features/context-usage-visibility.json
- Markdown: https://canmyagentuse.com/features/context-usage-visibility.md

Terminology basis: **Common product term** — https://learn.chatgpt.com/docs/reference/slash-commands.

## Current support at a glance

Context usage: 5 supported, 0 partial, 0 unsupported, 26 unreviewed across 31 cataloged products.

- Reviewed current products: 5 of 31
- Supported: 5
- Partial: 0
- Unsupported: 0
- Unreviewed: 26
- Not applicable: 0

Unknown or unreviewed means insufficient published evidence; it does not mean unsupported.

This row asks whether the exact harness shows the operator how much context is in use or remains. An exact token count, a percentage estimate, and a warning shown only at exhaustion are materially different and should be qualified.

The most useful implementations identify contributions from conversation turns, project instructions, tool schemas, retrieved files, images or video, long-term memory, and reserved output. Evidence should also say whether the meter updates before a request, after server-side processing, or only in logs.

## Catalog context

- Category: [models-context](/categories/models-context.md)
- Terminology basis: Common product term
- Aliases: context meter, token counter, context inspector
- Family: [Models and context](/features/models-and-context.md)
- Siblings: [Automatic context compaction](/features/automatic-context-compaction.md), [Context compaction controls](/features/context-compaction-controls.md), [Context window](/features/context-window.md), [Local models](/features/local-models.md), [Model fallback](/features/model-fallback.md), [Model selection](/features/model-selection.md), [Output token limit](/features/output-token-limit.md), [Prompt cache controls](/features/prompt-cache-controls.md), [Prompt cache telemetry](/features/prompt-cache-telemetry.md), [Prompt caching](/features/prompt-cache-reuse.md), [Reasoning effort controls](/features/reasoning-effort-controls.md)

## Compatibility assertions

Unknown means insufficient published evidence; it does not mean unsupported.

### ChatGPT (web)

- Harness: [ChatGPT](/harnesses/chatgpt-web.md)
- current: **Unknown**
- preview: **Unknown**

### Claude (web)

- Harness: [Claude](/harnesses/claude-web.md)
- current: **Unknown**
- preview: **Unknown**

### Gemini (web)

- Harness: [Gemini](/harnesses/gemini-web.md)
- current: **Unknown**
- preview: **Unknown**

### Copilot (web)

- Harness: [Copilot](/harnesses/copilot-web.md)
- current: **Unknown**
- preview: **Unknown**

### Grok (web)

- Harness: [Grok](/harnesses/grok-web.md)
- current: **Unknown**
- preview: **Unknown**

### Grok Bot (desktop)

- Harness: [Grok Bot](/harnesses/grok-bot-desktop.md)
- current: **Unknown**

### Perplexity (web)

- Harness: [Perplexity](/harnesses/perplexity-web.md)
- current: **Unknown**
- preview: **Unknown**

### Le Chat (web)

- Harness: [Le Chat](/harnesses/le-chat.md)
- current: **Unknown**
- preview: **Unknown**

### Devin (web)

- Harness: [Devin](/harnesses/devin-web.md)
- current: **Unknown**
- preview: **Unknown**

### Replit Agent (web)

- Harness: [Replit Agent](/harnesses/replit-agent.md)
- current: **Unknown**
- preview: **Unknown**

### ChatGPT (desktop)

- Harness: [ChatGPT](/harnesses/chatgpt-desktop.md)
- current: **Supported**
  - Target: dated-documentation — current ChatGPT desktop documentation; observed 2026-08-28
  - Environment: local-default
  - Constraint (runtime): /status shows the chat ID, context usage, and rate limits
  - Evidence: [OpenAI — ChatGPT desktop slash commands](https://learn.chatgpt.com/docs/reference/slash-commands) — documented; observed 2026-08-28
  - Qualification note 1: Evidence checked 2026-08-28: ChatGPT desktop documents /status as showing context usage; the Codex CLI interface documents remaining context in its session footer.
- preview: **Unknown**

### Claude (desktop)

- Harness: [Claude](/harnesses/claude-desktop.md)
- current: **Unknown**
- preview: **Unknown**

### Cursor (desktop)

- Harness: [Cursor](/harnesses/cursor.md)
- current: **Unknown**
- preview: **Unknown**

### OpenWork Desktop (desktop)

- Harness: [OpenWork Desktop](/harnesses/openwork-desktop.md)
- current: **Unknown**

### Copilot Chat (desktop)

- Harness: [Copilot Chat](/harnesses/vscode-copilot.md)
- current: **Supported**
  - Target: dated-documentation — current VS Code agent-session documentation; observed 2026-08-28
  - Environment: local-default
  - Constraint (runtime): the chat input control shows current usage, exact token count, a category breakdown, and the selected model's available context
  - Evidence: [Microsoft — Manage agent sessions in VS Code](https://code.visualstudio.com/docs/agents/run/sessions/manage-sessions) — documented; observed 2026-08-28
  - Qualification note 3: Evidence checked 2026-08-28: VS Code's context-window control reports token count, percentage usage, category breakdown, and session AI credits for agent chats.
- preview: **Unknown**

### Chrome WebMCP origin trial (desktop)

- Harness: [Chrome WebMCP origin trial](/harnesses/chrome-webmcp-preview.md)
- current: **Unknown**

### Windsurf (desktop)

- Harness: [Windsurf](/harnesses/windsurf.md)
- current: **Unknown**
- preview: **Unknown**

### Zed Agent (desktop)

- Harness: [Zed Agent](/harnesses/zed-agent.md)
- current: **Unknown**
- preview: **Unknown**

### Continue (desktop)

- Harness: [Continue](/harnesses/continue.md)
- current: **Unknown**
- preview: **Unknown**

### Cline (desktop)

- Harness: [Cline](/harnesses/cline.md)
- current: **Unknown**
- preview: **Unknown**

### JetBrains AI (desktop)

- Harness: [JetBrains AI](/harnesses/jetbrains-ai.md)
- current: **Unknown**
- preview: **Unknown**

### Warp (desktop)

- Harness: [Warp](/harnesses/warp.md)
- current: **Unknown**
- preview: **Unknown**

### Claude CLI (cli)

- Harness: [Claude CLI](/harnesses/claude-cli.md)
- current: **Supported**
  - Target: dated-documentation — current Claude Code documentation; observed 2026-08-28
  - Environment: local-default
  - Constraint (runtime): /usage and status-line fields expose token usage; /context identifies major context consumers such as MCP definitions
  - Evidence: [Anthropic — Manage Claude Code costs](https://code.claude.com/docs/en/costs) — documented; observed 2026-08-28
  - Qualification note 2: Evidence checked 2026-08-28: Claude Code documents /usage and a configurable status line for current token usage, plus /context for identifying major context consumers.
- preview: **Unknown**

### ChatGPT CLI (cli)

- Harness: [ChatGPT CLI](/harnesses/chatgpt-cli.md)
- current: **Unknown**
- preview: **Unknown**

### Codex CLI (cli)

- Harness: [Codex CLI](/harnesses/codex-cli.md)
- current: **Supported**
  - Target: dated-documentation — current Codex CLI documentation; observed 2026-08-28
  - Environment: local-default
  - Constraint (runtime): the interactive interface displays remaining context as a percentage; the reviewed page does not document a component-by-component breakdown
  - Evidence: [OpenAI — Codex CLI](https://learn.chatgpt.com/docs/codex/cli) — documented; observed 2026-08-28
  - Qualification note 1: Evidence checked 2026-08-28: ChatGPT desktop documents /status as showing context usage; the Codex CLI interface documents remaining context in its session footer.
- preview: **Unknown**

### OpenCode (cli)

- Harness: [OpenCode](/harnesses/opencode.md)
- current: **Unknown**
- preview: **Unknown**

### Gemini CLI (cli)

- Harness: [Gemini CLI](/harnesses/gemini-cli.md)
- current: **Unknown**
- preview: **Unknown**

### Aider (cli)

- Harness: [Aider](/harnesses/aider.md)
- current: **Unknown**
- preview: **Unknown**

### Goose (cli)

- Harness: [Goose](/harnesses/goose.md)
- current: **Unknown**
- preview: **Unknown**

### Copilot CLI (cli)

- Harness: [Copilot CLI](/harnesses/copilot-cli.md)
- current: **Supported**
  - Target: dated-documentation — current GitHub Copilot CLI context-management documentation; observed 2026-08-28
  - Environment: local-default
  - Constraint (runtime): /context displays total usage plus token and percentage breakdowns for context components
  - Evidence: [GitHub — Managing context in Copilot CLI](https://docs.github.com/en/enterprise-cloud@latest/copilot/concepts/agents/copilot-cli/context-management) — documented; observed 2026-08-28
  - Qualification note 4: Evidence checked 2026-08-28: GitHub Copilot CLI documents `/context` as a token-usage visualization and breakdown of the current context window.
- preview: **Unknown**

### Amp (cli)

- Harness: [Amp](/harnesses/amp-cli.md)
- current: **Unknown**
- preview: **Unknown**