Blog
CoreCode Blog
Prices, versions and practice for Claude Code and the Claude API. Every statement about Anthropic links to its official documentation, with the date it was checked.
- Claude Fable 5.1: API pricing, 1M context, and how to use it in Claude CodeClaude Fable 5.1's official specs and prices: model ID, 1M context, 128K output, $10 / $50 per million tokens, cache reads at 0.025x, how it differs from Fable 5 and Opus 5.5, which tasks it is worth it for, and how to select it in Claude Code.
- Claude Opus 5.5: API pricing, 1M context, and how to use it in Claude CodeClaude Opus 5.5's official specs and prices: model ID, 1M context, 128K output, $4 / $20 per million tokens, cache reads at 0.05x, fast mode prices, how it differs from Opus 5, Sonnet 5.5 and Fable 5.1, and how to use it in Claude Code.
- Claude Sonnet 5.5: API pricing, 1M context, and how to use it in Claude CodeClaude Sonnet 5.5's official specs and prices: model ID, 1M context, 128K output, $2 / $10 per million tokens, cache reads at 0.05x, how it differs from Sonnet 5 and Opus 5.5, its five breaking API changes, and how to make it your everyday model in Claude Code.
- Last checked Claude API pricing (November 2026): input, output and cache prices per modelOfficial Claude API prices for Fable 5.1, Opus 5.5, Sonnet 5.5 and Haiku 5.5: input, output, 5-minute and 1-hour cache writes and cache reads, the batch discount, long-context rules, and what one Claude Code request costs.
- Claude Code commands: slash commands and keyboard shortcuts cheat sheetA cheat sheet of the 22 slash commands and 17 keyboard shortcuts you use most in Claude Code, checked against Anthropic's docs, with aliases and plan or platform limits noted.
- Claude Code context window explained: what fills it, what to do when it is full, what /compact keepsWhat fills Claude Code's context window, how to check it with /context, what happens when it fills, and what survives /compact. Includes how to use /compact, /clear and /rewind to keep context lean.
- Claude Code GitHub Actions setup: @claude in issues and PRsSet up Claude Code GitHub Actions: quick setup with /install-github-app or manual setup with the GitHub App, a secret and a workflow file, then @claude in issues and PRs, with inputs, permissions, costs and fixes.
- claude -p guide: run Claude Code non-interactively in scripts and CIHow to use claude -p to run Claude Code non-interactively from scripts and CI: piping input, text, json and stream-json output, tool permissions, resuming sessions and --bare mode.
- Claude Code hooks tutorial: how to set up hooks, events and working examplesHow to set up Claude Code hooks: where to put them in settings.json, the event, matcher and handler structure, copy-paste examples for notifications, auto-formatting and protected files, exit code 2 blocking, and debugging.
- Claude Code latest version and release notes: the current version, what changed and how to updateThe current Claude Code versions on the latest and stable channels, synced hourly from npm. The notable changes in recent releases, and how to check your version, update, switch between the latest and stable channels, and turn off auto-updates.
- Claude Code MCP setup: how to add, share and troubleshoot MCP serversAdd an MCP server to Claude Code with claude mcp add: the commands for HTTP, SSE and stdio, the local, project and user scopes, sharing a server with your team through .mcp.json, plus authentication and troubleshooting.
- Claude Code permission modes: default, acceptEdits, plan, auto and bypassPermissionsClaude Code permission modes explained: what default, acceptEdits, plan, auto, dontAsk and bypassPermissions allow without asking, how to switch, and how to cut prompts safely.
- Claude Code skills: how to use them and write SKILL.md (where it goes, how it triggers)How to use and write Claude Code skills: where SKILL.md files live and which wins on a name clash, the frontmatter fields that matter, invoking a skill yourself or letting Claude choose, stopping automatic use, and troubleshooting.
- Claude Code subagents: how to create, configure and use themHow to use Claude Code subagents: what they are, the built-in ones, creating your own, where the files live and which wins, the frontmatter fields that matter, choosing a model, delegation, and what to check when one is not found.
- Claude Code on a subscription, the API or a relay? Prices, limits and when each fitsThree ways to pay for Claude Code: a Claude Pro or Max subscription, the Anthropic API billed by the token, or a third-party relay. Prices, usage limits and availability compared from Anthropic's own pages, and how to choose by how much you use it.