How much does Claude Sonnet 5.5 cost in Claude Code?

The Claude Code 2.1.284 release notes list Claude Sonnet 5.5 at $2 per million input tokens and $10 per million output tokens, with cache reads at $0.20 per million tokens. The model has a 1M-token context window and becomes the default Sonnet model in Claude Code from this version.

Can Claude Code show how much money I have spent?

Yes. From Claude Code 2.1.284, the /usage command and the status line show spending in US dollars, in a form like "$271.40 / $500.00 spent this month". Earlier versions reported usage without the dollar amount against the monthly limit.

How do I restart failed MCP servers in Claude Code?

Claude Code 2.1.284 adds a /mcp reconnect all command that retries every MCP server that failed to connect. The same release also makes MCP tool calls in a resumed session wait up to 10 seconds for their server to connect instead of failing straight away.

What else changed in Claude Code 2.1.284 besides Sonnet 5.5?

Claude Code 2.1.284 adds certificate-based client authentication for the Claude apps gateway, Google Cloud OTLP telemetry export, new keybinding actions for the effort slider, and VS Code message timestamps. It also retries damaged response streams, tries more compaction after "Prompt is too long" errors, and fixes Agent SDK crashes on malformed images and documents.

Anthropic · 2026-09-28 · major

Claude Code 2.1.284 — Sonnet 5.5 becomes the default Sonnet with 1M context

Claude Code 2.1.284 makes Claude Sonnet 5.5 the default Sonnet model with a 1M-token context, shows spending in US dollars in /usage, adds /mcp reconnect all, and retries damaged response streams instead of showing raw errors.

The terminal agent switches to Anthropic's new Sonnet on the day it ships and starts showing costs in dollars.

Quick facts

Version	v2.1.284
Maker	Anthropic
Released	2026-09-28
Default Sonnet	claude-sonnet-5-5, 1M-token context
Sonnet 5.5 price	$2 / $10 per 1M input / output tokens; $0.20 cache reads
New command	/mcp reconnect all

What is it?

Claude Code 2.1.284 switches the default Sonnet model to Claude Sonnet 5.5, released the same day, with a 1M-token context window. The release also shows spending in US dollars in /usage and the status line, for example "$271.40 / $500.00 spent this month", and adds a "Yes, but ask again next time" answer for auto mode file-read prompts.

How does it work?

Reliability work makes up much of the list. A damaged response stream is now retried instead of printed as a raw error, a "Prompt is too long" error triggers more compaction attempts, and MCP tool calls in a resumed session wait up to 10 seconds for the server to connect. /mcp reconnect all retries every failed MCP server at once, and telemetry can now be exported to Google Cloud over OTLP.

Why does it matter?

Anyone who picks Sonnet in Claude Code now gets the newer, cheaper model without changing a setting. Dollar amounts in the status line make plan limits easier to read than token counts. The release also carries VS Code message timestamps, certificate-based client authentication for the Claude apps gateway, and more than 70 other fixes.

Who is it for?

Claude Code users and team admins

Frequently asked questions

How much does Claude Sonnet 5.5 cost in Claude Code?: The Claude Code 2.1.284 release notes list Claude Sonnet 5.5 at $2 per million input tokens and $10 per million output tokens, with cache reads at $0.20 per million tokens. The model has a 1M-token context window and becomes the default Sonnet model in Claude Code from this version.
Can Claude Code show how much money I have spent?: Yes. From Claude Code 2.1.284, the /usage command and the status line show spending in US dollars, in a form like "$271.40 / $500.00 spent this month". Earlier versions reported usage without the dollar amount against the monthly limit.
How do I restart failed MCP servers in Claude Code?: Claude Code 2.1.284 adds a /mcp reconnect all command that retries every MCP server that failed to connect. The same release also makes MCP tool calls in a resumed session wait up to 10 seconds for their server to connect instead of failing straight away.
What else changed in Claude Code 2.1.284 besides Sonnet 5.5?: Claude Code 2.1.284 adds certificate-based client authentication for the Claude apps gateway, Google Cloud OTLP telemetry export, new keybinding actions for the effort slider, and VS Code message timestamps. It also retries damaged response streams, tries more compaction after "Prompt is too long" errors, and fixes Agent SDK crashes on malformed images and documents.

Try it

npm i -g @anthropic-ai/claude-code@2.1.284