Follow Discord
Sweep 02 Oct 2026 · 18:55Z Build v2.1.288 509 read Stable v2.1.285 Latest v2.1.288 Next v2.1.288 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 1 Oct 2026
One change · claude-code

Explore the context window changedcontext-window

Nearest release: v2.1.286, published 10 hours before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 1 Oct 2026 03:54 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 1 Oct 2026 04:07 UTC.

Upstream edited
Recorded here
Lines+1added
Lines−1removed
From line 1,624 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits14to this page, all time

The whole hunk

from line 1624, old and new numbered
/
lines
from line 1624
16241624 
16251625If you need a larger window rather than a smaller conversation, Fable models, Sonnet 5 and later, Opus 4.6 and later, and Sonnet 4.6 support a 1 million token context window. See [Extended context](/docs/en/model-config#extended-context) for availability by plan and how to select a `[1m]` model variant. Compaction works the same way at the larger limit.
16261626 
1627Sonnet 5.5 and Sonnet 5 run with the 1M context window and have no `[1m]` variant to select. See [Sonnet 5.5 and Sonnet 5 context window](/docs/en/model-config#sonnet-5-5-and-sonnet-5-context-window) for their auto-compaction thresholds and the LLM gateway exception.
1627Sonnet 5.5 and Sonnet 5 run with the 1M context window and have no `[1m]` variant to select. See [Sonnet 5.5 and Sonnet 5 context window](/docs/en/model-config#sonnet-5-5-and-sonnet-5-context-window) for their auto-compaction thresholds, and [the context window behind a gateway](/docs/en/model-config#context-window-behind-a-gateway) for how Claude Code sizes the window when you set `ANTHROPIC_BASE_URL` to an [LLM gateway](/docs/en/llm-gateway).
16281628 
16291629The point where automatic compaction runs depends on your model and configuration. See [Default auto-compact thresholds](/docs/en/model-config#default-auto-compact-thresholds) for the boundaries per model, and [Correct the window for a gateway or custom model ID](/docs/en/model-config#correct-the-window-for-a-gateway-or-custom-model-id) if Claude Code assumes the wrong window for your model ID, such as an [LLM gateway](/docs/en/llm-gateway) alias.
16301630 
Feedback