Packaging change·Feb 9 → Feb 18, 2026·Week 8, 2026·AI & Machine Learning
Anthropic API replaces Sonnet 4.5 with 4.6 at same price point
What changed
New plan
Sonnet 4.5 retired from current models and moved to legacy section; now listed as first legacy model (previously Opus 4.5 was first legacy)
New plan
Sonnet 4.6 introduced to current API models replacing Sonnet 4.5 at same price point ($3 input / $15 output per MTok)
Before and after
Feb 9, 2026 vs Feb 18, 2026Pulse.
100%
Change 1 of 5 · plan added
Sonnet 4.5 retired from current models and moved to legacy section; now listed as first legacy model (previously Opus 4.5 was first legacy)
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Week 7, 2026 · Anthropic API rolls out tiered pricing for Opus 4.6 by context lengthAnthropic API simplifies pricing, removes volume-based tiers · Week 12, 2026
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