--- title: "Prompt cache telemetry" canonical: "https://canmyagentuse.com/features/prompt-cache-telemetry" contentKind: "feature" locale: "en" description: "Report cache reads, writes, hits, misses, saved latency, or cached-token billing for a run." llmSummary: "Prompt-cache telemetry exposes whether reuse occurred and, ideally, cached read/write tokens, cost, latency, and cache scope; documented caching without visibility is a separate claim." publishedAt: "2026-08-28T00:00:00.000Z" updatedAt: "2026-08-28T00:00:00.000Z" verifiedAt: "2026-08-28" tags: ["context","prompt-caching","telemetry","cost"] --- # Prompt cache telemetry Prompt-cache telemetry exposes whether reuse occurred and, ideally, cached read/write tokens, cost, latency, and cache scope; documented caching without visibility is a separate claim. - HTML: https://canmyagentuse.com/features/prompt-cache-telemetry - JSON: https://canmyagentuse.com/api/v1/features/prompt-cache-telemetry.json - Markdown: https://canmyagentuse.com/features/prompt-cache-telemetry.md Terminology basis: **Common product term** — https://code.claude.com/docs/en/prompt-caching. ## Current support at a glance Prompt cache telemetry: 1 supported, 1 partial, 0 unsupported, 29 unreviewed across 31 cataloged products. - Reviewed current products: 2 of 31 - Supported: 1 - Partial: 1 - Unsupported: 0 - Unreviewed: 29 - Not applicable: 0 Unknown or unreviewed means insufficient published evidence; it does not mean unsupported. This row asks whether an operator can verify prompt-cache behavior for the exact harness. A billing dashboard total, per-request cached-token count, cache-hit event, and detailed read/write breakdown provide different levels of evidence and should be qualified. Useful records identify where telemetry appears, how long it is retained, whether sub-agent and tool-generated requests are included, and how cached reads and writes map to price. A generic statement that caching is automatic does not prove that the harness exposes telemetry. ## Catalog context - Category: [models-context](/categories/models-context.md) - Terminology basis: Common product term - Aliases: cache hit metrics, cached tokens, cache observability - 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 usage](/features/context-usage-visibility.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 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: **Unknown** - 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: **Unknown** - 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): current_usage exposes cache_creation_input_tokens and cache_read_input_tokens; OpenTelemetry reports cache read and creation tokens per request, user, and session - Evidence: [Anthropic — How Claude Code uses prompt caching](https://code.claude.com/docs/en/prompt-caching) — documented; observed 2026-08-28 - Evidence: [Anthropic — Monitor Claude Code usage](https://code.claude.com/docs/en/monitoring-usage) — documented; observed 2026-08-28 - Qualification note 1: Evidence checked 2026-08-28: Claude Code exposes cache creation and cache read token counts through status-line data and OpenTelemetry, including per-user and per-session organization metrics. - 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: **Unknown** - preview: **Unknown** ### OpenCode (cli) - Harness: [OpenCode](/harnesses/opencode.md) - current: **Unknown** - preview: **Unknown** ### Gemini CLI (cli) - Harness: [Gemini CLI](/harnesses/gemini-cli.md) - current: **Partial** - Target: dated-documentation — current Gemini CLI documentation; observed 2026-08-28 - Environment: local-default - Constraint (runtime): /stats displays cached-token savings when caching is available; the reviewed page does not establish hit/miss events or retained historical telemetry - Evidence: [Google — Gemini CLI token caching](https://geminicli.com/docs/cli/token-caching/) — documented; observed 2026-08-28 - Qualification note 2: Evidence checked 2026-08-28: Gemini CLI documents cached-token savings in /stats when token caching is available. - 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: **Unknown** - preview: **Unknown** ### Amp (cli) - Harness: [Amp](/harnesses/amp-cli.md) - current: **Unknown** - preview: **Unknown**