Anthropic cuts Claude Code response lag nearly 3x to 1.33 seconds

Gzip compression and earlier cloud session startup drove the latency drop across local, cloud, web and API surfaces Anthropic has made Claude Code noticeably less sluggish. First-token latency for local sessions fell from 4.07 seconds to 1.33 seconds between August and October 2026, an improvement of nearly 3x. The fix was not a new model or an exotic breakthrough. It came from compressing conversation data and starting cloud sessions before users finish typing. The update was announced on October 17, 2026, through the ClaudeDevs account. It covers several Claude products, with the headline gains in Claude Code. The key metric is first-token p90 latency. First-token latency is how long you wait before the model starts producing any reply at all.

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