Claude Code 2.1.300 compresses large API requests with gzip, even with telemetry off; an environment variable opts out.

Anthropic's changelog dated October 14, 2026 says setting CLAUDE_CODE_GZIP_REQUEST_BODIES=0 turns it off.

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Check our sources · 3 facts from 1 source

Anthropic's Claude Code changelog lists version 2.1.300 on October 14, 2026. Under Changed it says large requests to api.anthropic.com use gzip compression even when telemetry is disabled. The changelog says setting CLAUDE_CODE_GZIP_REQUEST_BODIES=0 turns it off.

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1 Claude Code changelogAnthropic · 22 Sep 2026 · 3 facts

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The Claude Code changelog lists version 2.1.300 with the date October 14, 2026.

October 14, 2026
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The changelog's 2.1.300 entry under Changed says large requests to api.anthropic.com now use gzip compression even when telemetry is disabled.

Changed large requests to api.anthropic.com to use gzip compression even when telemetry is disabled
cite
The changelog says setting CLAUDE_CODE_GZIP_REQUEST_BODIES=0 turns the gzip compression off.

set CLAUDE_CODE_GZIP_REQUEST_BODIES=0 to turn it off
cite

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