Anthropic reduced Claude Code’s first-token latency from 4.07 seconds to 1.33 seconds between August and October 2026, a nearly threefold improvement. This speed boost came from two technical changes: gzip compression of per-turn conversation data and pre-starting cloud sessions as soon as users begin typing. Cloud sessions saw the largest gains, dropping from 16.99 seconds to 6 seconds, while web and API interfaces also benefited from roughly 1.5x faster response times. The announcement on October 17, 2026, follows a broader internal effort that produced over 3,000 performance improvements across various Claude products.
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